Exam 2 – Example Questions

A new local bookstore wants tounderstand consumer likes andpreferences. You are hired to do amarketing research study.

Q1 - Easy

•The town has 15,000 residents and arethe restaurant’s target audience. Insampling terms the town residentsrepresent the

–Sampling frame

–Population

–Sample

–Census

–Statistic

Q2 - Easy

•The mean attitudes towards bookstorescomputed by surveying the entire targetaudience of 15,000 was 3.0, on a 1 – 5(strongly disagree --- strongly agree) Likertscale. This figure represents a

–Statistic

–Census

–Parameter

–Z value

–None of the above

Q3 - Easy

•While collecting data on the town’s residents younotice that they are predominantly of three types –retirees, farmers and university students. You feel thatthe three groups may differ significantly betweenthemselves on their preferences and likes aboutreading. The appropriate sampling procedure to followin this case would be

–Stratified sampling

–Simple random sampling

–Judgment sampling

–Cluster sampling

–Systematic sampling

Q4 - Easy

•After completing your survey, you arenow ready to begin data analysis. Youneed to assign numerical values to theresponses. This process is known as

–Editing

–Coding

–Weighting

–Adjusting the data

–Scale transformations

Q5 -Easy

•You collect responses on gender andoccupation. The proper way to formconclusions about any relationship betweenthe two would be through

–Cross tabulations and chi-square tests

–Frequency distribution

–Finding the arithmetic means of the two variables

–Pearson correlation coefficient (r)

–Histogram

Q6 - Easy

•Your client believes that the mean attitude tobookstores in town amongst the entire targetaudience of 15,000 is 3.0. The observedattitude from your study from the portion yousurveyed is found to be 3.5. Your researchhypothesis for the study would be

–Mean attitude to bookstores is not equal to 3.0

–Mean attitude to bookstores = 3.5

–Mean attitudes to bookstores = 3.0

–Mean attitudes to bookstores is not equal to 3.5

–Mean attitude to bookstores is equal to -0.5 (3.0 –3.5)

Q7 - Medium

•In your study you find that the observed meanattitude (3.5) to bookstores appears to be dueto chance. If you reject the null hypothesis youare committing a

–Type 2 error

–Type 3 error

–Type 1 error

–No error. Your decision is correct

–Sampling error

Q8 - Hard

•If you wanted to minimize the risk of acceptinga false null hypothesis you would

–Increase your confidence level from 95% to 99%

–Keep confidence level unchanged but use adifferent probability distribution

–Reduce the sample size

–Reduce your confidence level from 95% to 90%

–Reduce sample size and use a different probabilitydistribution

Q9 - Medium

•The book store has also collected data ongender and now wants to test if attitudes varysignificantly be gender. The correct test to usewould be

•Hypothesis testing with one mean

•Hypothesis testing with two independent means

•Hypothesis testing with two dependent means

•One way ANOVA

•Chi-square test of independence

Q10 - Medium

•In hypothesis test with two independent means, yourresearch hypothesis is

a. Do the two means come from the same population?

b. Do the two means come from different populations?

c. Do the differences between the two sample meansalso exist in the population?

d. ‘a’ and ‘c’ above

e. ‘b’ and ‘c; above

Q11 - Hard

•The bookstore wants to test if females have asignificantly more positive attitude than females. You dothe appropriate test and reject the null hypothesis. Youradvice to the bookstore would be

–There is no need to modify the ad campaign

–Females need more targeted promotions than males

–Males need more targeted promotions than females

–No significant advice can be given on the basis of thistest

Q12 - Easy

•If there are no between group differencesthen the observed F statistic in theANOVA will be

–0

–Infinity

–1

–An indeterminate number

–negative

Q13 - Medium

•The One way ANOVA has

–Two or more independent variables and twoor more factors per variable

–No independent variables and no factors

–One independent variable and no factors

–One independent variable and more than twofactors for the IV

–More than two dependent variables, oneindependent variable and more than twofactors for the IV

Q14-Medium

•If your objective is to make the hypothesistest powerful enough to spot the effect,you would prefer to test at the ____ levelof significance

–1%

–3%

–5%

–8%

–10%

Q15 - Medium

•If your objective is to minimize thechances of committing a Type 1 error, youwould prefer to test at the ____ level ofsignificance

–1%

–3%

–5%

–8%

–10%

Q16 - Easy

•In a one tailed test if your Ho is miu < 2.6,to reject the null hypothesis, you will

–Look in the right tail of the distribution

–Look in the left tail of the distribution

–Look in the areas beyond the critical teststatistic in both tails of the distribution

–Look in the area bounded on both sides bythe critical test statistic in the distribution

–The data is insufficient to form a conclusion

Q17 - Easy

•Variable re-specification involves

–Coding the responses

–Reversing the coding order

–Inserting missing values using means

–Throwing out the variable as unusable

–Combining two or more variables into anothervariable

Q18 - Easy

•You want to measure undergraduate student attitudes toa college education in the U.S. You feel that the attitudeswould largely be the same across the country. In order tosave time, money and effort, you appropriate samplingstrategy in this case would be:

•Stratified sampling

•Systematic sampling

•Cluster sampling

•Snowball sampling

•Simple random sampling