Model Exit Exam for BSc in Statistics, 2016

0 votes, 0 avg

Model Exit Exam for BSc in Statistics at Salale University, 2016 E.C

The Model Exit Exam Has 120  Multiple Choose Questions.

                  Please try to answer all questions !

1 / 120

1) ___is the study of the childbearing performance of individuals, couples, groups, and populations.

2 / 120

2) To assign a value 1, 2 , 3,4,5, 6 and 7 to a variable x in R, which one of the following is the correct assignment?

3 / 120

3) Which one of the following r commands is correct to conduct two sample t-tests (or independent-samples T-test), by assuming equal population variance?

4 / 120

4) One of the following is/are properties of R software :

5 / 120

5) Which one of the following r commands is correct to conduct two sample t-tests

6 / 120

6) Which one of the following r codes can be used to draw 100 random numbers from a poisson distribution with lamda 4?

7 / 120

7) Which one of the followings is used for writing as well as executing commands on r software?

8 / 120

8) Which function is used to create the vector with more than one element?

9 / 120

9) One of the following is considered as a menu in SPSS software

10 / 120

10) One of the following is considered as the most commonly used editing techniques of SPSS outputs

11 / 120

11) Which one of the following is true?

12 / 120

12) Which one of the following is not true about levels of measurement on SPSS

13 / 120

13) If someone is interested to consider females only under variable gender for analysis,which menu will be used to do so?

14 / 120

14) Which of the following is true about a Data Editor window on SPSS

15 / 120

15) Which one of the following is True about varaible naming in SPSS software:

16 / 120

16) _____is the average number of children that would be born to a woman by the time she ended childbearing if she were to pass through all her childbearing years conforming to the age-specific fertility rates of a given year.

17 / 120

17) Which one of the following is not true about census servey

18 / 120

18) _____is the study of the child bearing performance of individuals, couples, groups and populations.

19 / 120

19) Which of the following is/are true?

20 / 120

20) If we would like to consider the level of population replacement of a specific region, as well as the factors of mortality among mothers during their childbearing, we have to estimate ____

21 / 120


Which of these terms means “A movement of peoples from one region to another within the same country”?

22 / 120

22) Which one of the following is true about dependency ratio(DR)?

23 / 120

23) Which one of the following is/are true about the properties of simple logistic regression?

24 / 120

24) The logistic regression model parameter is estimated by using _____ methods

25 / 120

25) Which of the fooling is not true about simple Poisson regression model that uses continuous predictor variable?

26 / 120

26) Which of the following statement is not true?

27 / 120

27) Suppose a health scientist has the condition of patients in some hospital rated as (serious, fair and good) as a response variable and he has the desire to regress the response to a set of patient’s characteristics. Which method is the most appropriate method?

28 / 120

28) The appropriate modelling applied for a categorical response variable with three or more categories could be ?______

29 / 120

29) Which of the following is true about goodness-of-fit for a logistic model?

30 / 120

30) Suppose a model was fitted predicting the result of entrance exam for some job (fail=1, pass=0) in SLU as a function of age (x) in years, the predicted logit equation obtained was logit (π(x))= 2+0.6age with the standard error of the coefficient=.02. For this prediction equation,

31 / 120

31) In studying the of association between smoking status and cancer the interval (1.3, 1.5) is the 95% confidence interval of the odds ratio with respect to smoking status and lung cancer. What can one say about the true odds ratio?

32 / 120

32) Which of the following refers to a relatively high correlation among the independent

33 / 120

33) In a regression analysis if SSE = 200 and SSR = 300, then the coefficient of determination is ___________

34 / 120

34) If the correlation coefficient is 0.8, the percentage of variation in the response variable explained by the variation in the explanatory variable is____________

35 / 120

35) If two variables x  and y, have a very strong linear relationship and y is considered as dependent and X be the independent variables, then ____________

36 / 120

36) If there is non-linear relationship between the corresponding repressor’s (independent variables x’s) and the response variable (Y) and undesirable residual pattern occur, then the appropriate method to correct it can be:

37 / 120

37) Which one of the following is true about Heteroskedasticity and residual in regression, respectively ?

38 / 120

38) In regression analysis, the variable that is being predicted is the __________

39 / 120

39) One of the following is an analysis method used to model the relationship between one continuous dependent variable and one or more continuous or discrete independent variables

40 / 120

40) Regression modelling is a statistical framework for developing a mathematical equation that describes how __________

41 / 120

41) Moving average method isused for measurement of trend when________

42 / 120

42) A time series model has fitted to some historical data and yielding Yt = 25+0.34Yt-1 + εt. Suppose that at time T=100, the observation is Y100 = 28, then what is the forecasts for periods 101?

43 / 120

43) Identify the wrong statment

44 / 120

44) Which of the following Forecasts can be made on a basis using judgment, intuition, commercial knowledge and any other relevant information?

45 / 120

45) Which of the following is a common technique for estimating the trend component in a time series with seasonality?

46 / 120

46) Which of the following is a common method for detecting seasonality in a time series?

47 / 120

47) Any regular fluctuations with a period of less than one year are called___

48 / 120

48) The time series model has been fitted to some historical data having 100 observations asYt =εt – 0.5 εt-1.What is order of this model?

49 / 120

49) Which of the following statements is correct?

50 / 120

50) What is the primary objective of the Box-Jenkins methodology in time series analysis?

51 / 120

51) Identify the method that is not used to estimate the seasonal indices in Time sereie analysis.

52 / 120

52) Which measure is commonly used to assess the quality of healthcare in health data analysis?

53 / 120

53) What does the term “dropout rate” refer to in education data analysis?

54 / 120

54) Which measure is commonly used to analyze labor data to assess employment trends?

55 / 120

55) If someone lists a car or other product or service in the classifieds section of a newspaper, another consumer can buy that car directly from the seller. Which one of the following is the correct transaction?

56 / 120

56) An Investigators go back several decades to get the records of the factory workers from a manufacturing company. These workers could be investigated on how exposure to particular radiation from the machines affected them over the years. Which one of the following studies is correct to study this case?

57 / 120

57) A researcher wants middle-aged truck drivers who vary in terms of smoking habits, to test the hypothesis that the 20-year incidence rate of lung cancer will be highest among heavy smokers, followed by moderate smokers, and then nonsmokers. Which one of the following studies is correct to study this case?

58 / 120

58) The main types of measurement scales in Categorical or qualitative variables are __

59 / 120

59) A process that can be repeated any number of times under similar conditions and it is possible to enumerate the total number of outcomes without predicting an individual outcome

60 / 120

60) Let we have the values of X=( 2,3,6, and 100). Then which one of the measure of central tendency is the most appropriate measure of central tendency for X.

61 / 120

61) If X is a random variable and takes only specific or selectecd valuse, and these values are obtained through counting is called__________ variable.

62 / 120

62) _____ is a measures which measure of the spread of data around the mean?

63 / 120

63) The measure of variation which gives the number of standard deviation a particular observation Lie above orbelow the mean is known as________.

64 / 120

64) Which one of the following methods is an example of primary data collection ?

65 / 120

65) Which one of the following measures of dispersion used to make comparison in terms of the variability of two distributions which have different unit of measurement

66 / 120

66) When to use two the power of three factorial design?

67 / 120

67) Which one is not the basic principle of experimental design

68 / 120

68) An engineer designing a battery for use in a device that will be subjected to some extreme variations in temperature. The only design parameter that he can select at this point is the plate material for the battery, and he has three possible choices. Temperature can be controlled in the product development laboratory for the purpose of the test. All three plate materials tested at three temperature levels (15, 70, and 125 oF), four batteries are tested at each combinations plate material and temperature, and all 36 tests are performed in random. From this information complete the ANOVA table and answer the following question.From the above problem which factor is significant effect of battery life?

69 / 120

69) When do we have to use factorial design?

70 / 120

70) Why do researcher and experimenters use nested design?

71 / 120

71) If the researcher’s interest is generalized only about the treatments involved in the experiment, then the statistical model is

72 / 120

72) If the nuisance factors are unknown and uncontrollable, then which method is used to balance their impact?

73 / 120

73) In a single factor experiment of CRD with a treatment level, the a-l treatment means pairs are compared with one of the treatment mean called control. The test procedure that compare the a-1 treatments means with control treatment mean is called____

74 / 120

74) In certain multifactor experiments, the levels of one factor are similar but not identical for a different level of another factor is called ___________.

75 / 120

75) The design of experiment in which the effects of the levels of a factor are considered at various levels of the other factor is ____

76 / 120

76) Which on of the following statement is correct about completerly randimozed design, a single factor experiment

77 / 120

77) Which one of the following is true about split-plot design?

78 / 120

78) Which one is the advantage that nonparametric methods have over parametric methods?

79 / 120

79) Assume that that a researcher want to test the hypothiesis for two samples mean comparison and He/She use a 95% confidence interval for the mean diffence to decided the hypothesis. If confidence interval for the mean difference does not contain 0, then what should be the decision of the researcher based on the confidence interval?

80 / 120

80)   A non-parametric test would be used for

81 / 120

81) _______is a hypothesis test used to compare the mean charactersistics of a variable across more two different groups.

82 / 120

82) Assume that a simple random sample of 25 automobile tiers was drawn from a normally distributed population of certain production run. The mean and standard deviation of the lifetime of the tiers were 2200 miles and 500 miles, respectively. A 95% confidence interval for the mean lifetime of all tiers in this production line is_____?(t.025(25) =0.6844)

83 / 120

83) What test can be used to test the difference between two sample means when the population variances are known?

84 / 120

84) As sample size increases the values of an estimator approaches to the values of estimator this estimated is?

85 / 120

85) Which one of the following is true about t distribution

86 / 120

86) ___ is procedure that results in which a single values of statistic is used to estimate a parameter when the investigator doesn’t have prior information

87 / 120

87) The null hypothesis for chi-square test for independence is that the variable are

88 / 120

88) The degrees of freedom for test goodness of fit in chi-square is___?

89 / 120

89) Which of the following random variable is often referred to as a discrete
waiting-time of random variable and represents how long (in terms of the number of failures) one
waits for the rth success.

90 / 120

90) Suppose X1, X1, …, Xn are random variables distributed as standard normal distribution with mean µ_i=0, and standard deviations δ_i=1 and independent, then Y =〖X^2〗_(1,)+ 〖X^2〗_2 + 〖X^2〗_3+⋯+〖X^2〗_n is will be distributed as________

91 / 120

91) A shipment of 20 digital voice recorders contains 5 that are defective.
If 10 of them are randomly chosen for inspection with replacement, what is the probability that 2
of the 10 will be defective?

92 / 120

92) Suppose that the life time of certain light bulb is exponentially distributed with mean 100
bulbs. If 10 such light bulb is installed simultaneously, then,What is the expected life time of the distribution of the life of the light bulb that fails first?

93 / 120

93) Let X1 and X2 be two independent standard normal random variables. Let, Y1=X1+X2 and Y2= X2-X1. Then, what is the joint distribution of Y1 and Y2?

94 / 120

94) One of the following distribution is a distribution that answers the question of “how many trials needed to get the first success?

95 / 120

95) The ration of two independent standard normal random variables has a………… distibution.

96 / 120

96) If we have two independent chi-square random variables X and Y with degree freedom d and f, respectively. Then ratio of the chi-square distribution given by: T = (X⁄d)/(Y⁄f) is ___,

97 / 120

97) A random sample of 20 observations is selected from a normally distributed population. The sample variance is 12.96. In the 95 percent confidence interval for the population variance, the upper limit will be:

98 / 120

98) In Cramer-Rao Inequality var (sample statistic) is called.

99 / 120

99) An estimator is UMVUE if it is unbiased, sufficient and.

100 / 120

100) Sand is packed into bags which are then weighed on scales. It is known that if full bags of sand are intended to weigh μ kg, then the weight recorded by the scales will be normally distributed with a mean μ kg and a standard deviation of 0.36kg. A particular bag of sand was weighed four times and the weight recorded each time was different. The sample mean weight was recorded as 34.7kg. What is a 95percent confidence interval for the true weight of the full bag of sand?

101 / 120

101) Which one of the statements below is correct?

102 / 120

102) Which of the following statements is not correct?

103 / 120

103) Inferential statistics is the:

104 / 120

104) Which one of the following statement is true?

105 / 120

105) One of the following is correct about lot formation from the perspective of quality control

106 / 120

106) Which one of the following is true about control charts used to detect whether the process is in control or out control?

107 / 120

107) A supper market owner want to buy Sky Soap from the manufacturer with lot size 100 items with fraction of incoming defective for the entire lots is 10 % and the number of acceptance is 2. Using single sampling plan, the supermarket owner randomly selects 10 packed soaps for inspection and observes the number of defective. The number of non-conforming/defective/ is distributed as binomial distribution. The probability of acceptance (Pa) and average total inspections (ATI) is _____ and _____, respectively.

108 / 120

108) In quality control, acceptance sampling is most likely to be not useful when:

109 / 120

109) The basic role of statistical quality control in the product producing and service delivering modern business organization is____________

110 / 120

110) ___ is a cause variation in the quality characteristics of a product and distributed as non-normal or non- random manner.

111 / 120

111) In survey study, interviewer are liable to have mistaken and some of the ways the supervisor checks the quality of interviewing be:

112 / 120

112) One of the following is the main purpose of pilot survey:

113 / 120

113) _____ a questionnaire in where a pre-determined list of alternate responses is presented to the respondent for checking the appropriate one and the answers are restricting to limited ranges of response

114 / 120

114) _ is a sampling method used when population is divided in to non-overlapping but exhaustive groups and elements in the same group should be more or less heterogeneous while homogeneous in different group.

115 / 120

115) Direction: Read the following two paragraphs carefully and answer the questions: The Ministry of Education aimed to study academic performance trends and job opportunities of graduated students from 1999 to 2013 E.C across Ethiopian universities graduated students. In the first stage, the study randomly selected 15 (10 from government and 5 from private) universities out of 80 (45 government and 35 private) universities. In the second stage, it randomly selected 10 departments from each university. Lastly, 300 former graduated students from each department were included in the survey and the data was collected from the samples. The study finding report was written using more detailed and complex statistical techniques for other researchers or project managers who are interested in the technical details of research design, sampling design, statistical method, and tables. Based on the above Paragraph under direction, what type of survey design and report did the Ministry of Education use to study the academic performance and job opportunities of graduated students?

116 / 120

116) Mr. A is a Guinness statistics professor; do you like to be his student and advisee?” In the above question, which type of question writing (phrasing) problem, do we find?

117 / 120

117) ____ is type of longitudinal survey study in which it surveyed the same subjects (people, group or organization) at different times over an extended period.

118 / 120

118) _____is a questionnaire in which a pre-determined list of alternate responses is presented to the respondent for checking the appropriate one and the answers are restricting to limited ranges of response.

119 / 120

119) In sample size determination for a single stage sampling, which on is one of the following is needed?

120 / 120

120) An inquiry on small number of study unit in which greater detail investigation can be done without considering randomness of unit is called ______.

Your score is


Developed By KInfemichael Nigussie