Question

For each of the following two-samples t-tests (problems 1-6): (a) Determine if a F test for the ratio of two variances is appropriate to calculate for the context. If it is appropriate, conduct the analysis and report the result. Include what statistical conclusion you should draw from the analysis (i.e., whether you should conduct a pooled-variance t-test or an unequal-variances t-test). (b) Identify the most appropriate t-test to conduct for the situation/data given. Don’t forget to consider if the context requires one/two-tail tests. (c) Provide a statistical and practical interpretation of your findings.

6. Target versus Walmart: Who had the lowest prices? To address your consumer thirst for knowledge you identify 20 items (all brand-name items) currently on your household shopping list. You visit both your Local Target and Walmart, price each item, organize, and then store these data in TargetWalmart. Is there evidence to support that prices are cheaper at Walmart? (Use a 0.05 level of significance)

Shopping Item	Target	Walmart
1	3.29	3.77
2	23.79	24.52
3	1.09	1.64
4	23.39	24.18
5	11.89	12.06
6	7.09	8.01
7	19.09	19.22
8	2.29	2.02
9	10.49	11.16
10	2.29	2.55
11	2.99	2.43
12	21.09	20.69
13	4.49	3.88
14	7.09	6.23
15	5.39	5.21
16	10.29	10.51
17	2.49	3.31
18	1.19	1.18
19	3.29	4.06
20	3.69	4.21

Answer 1