PLEASE EXPLAIN how you got the answer. An airline recently conducted a randomize

Question

PLEASE EXPLAIN how you got the answer.

An airline recently conducted a randomized experiment to see whether callers would remain on hold longer, on the average, if they heard advertisements, Muzak, or classical music. To investigate the relationship between holding time and recording, the airline selected of 15 callers and randomly assigned 5 callers to each type of recording. The holding times were measured for each call with the following results.

Suppose A represents advertisements, M represents Muzak and C represents classical music. What are the best hypotheses to test this theory?

Are the conditions met to run the ANOVA test?

a) No, the combined sample size is less than 30.

b) No, the sample size in each group is less than 30.

c) No, the sample standard deviations are too dierent to meet the equal standard deviation assumption.

d) Yes, it was a SRS, the standard deviations are similar, and the combined sample size is 15.

e) Yes, it was a SRS, the standard deviations are similar enough, there are no extreme outliers and from the normal quantile plot of residuals we see that the normality condition is met.

Assume all conditions are met. the F-Ratio is

a) 1.057

b) 25.372

c) 78.865

d)12.433

e) none of the above

15- 10 -T 641.28 67 0.0 0,67 1.28a 64 1.6 0.5 -0.5 1.5 Ad Classical Muzak 0.03 0.1 0.2 0.5 8 0.9 0.97 Treatment Normal Quantile Plot Figure 3: Side by Side Boxplot and QQ Plot of the residuals

Explanation / Answer

Best hypothesis is part-(b)

Conditions are met, so part-( e ) is the answer

To calculate F-ratio we need the data which is absent

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