b-1. Calculate the value of the test statistic. Assume that o? = 4.9 and op? = 5.9. (Negative values should be indicated by a minus sign. Round intermediate calculations to at least 4 decimal places and final answer to 2 decimal places.)

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b-1. Calculate the value of the test statistic. Assume that o? = 4.9 and ag? = 5.9. (Negative values should be indicated by a minus
sign. Round intermediate calculations to at least 4 decimal places and final answer to 2 decimal places.)
Test statistic
Transcribed Image Text:b-1. Calculate the value of the test statistic. Assume that o? = 4.9 and ag? = 5.9. (Negative values should be indicated by a minus sign. Round intermediate calculations to at least 4 decimal places and final answer to 2 decimal places.) Test statistic
A consumer advocate researches the length of life between two brands of refrigerators, Brand A and Brand B. He collects data
(measured in years) on the longevity of 40 refrigerators for Brand A and repeats the sampling for Brand B. These data are measured
in years. (You may find it useful to reference the appropriate table: z table or t table)
Brand A
Brand B
Brand A
Brand B
13
22
19
12
24
15
12
25
18
25
25
24
15
14
24
12
17
20
17
25
25
25
20
23
12
15
14
24
12
16
20
12
20
16
21
23
18
13
17
22
17
24
20
23
13
15
19
17
16
16
15
13
17
24
14
17
25
20
25
25
12
20
15
23
16
18
18
13
24
22
18
13
17
20
24
20
15
18
12
22
Transcribed Image Text:A consumer advocate researches the length of life between two brands of refrigerators, Brand A and Brand B. He collects data (measured in years) on the longevity of 40 refrigerators for Brand A and repeats the sampling for Brand B. These data are measured in years. (You may find it useful to reference the appropriate table: z table or t table) Brand A Brand B Brand A Brand B 13 22 19 12 24 15 12 25 18 25 25 24 15 14 24 12 17 20 17 25 25 25 20 23 12 15 14 24 12 16 20 12 20 16 21 23 18 13 17 22 17 24 20 23 13 15 19 17 16 16 15 13 17 24 14 17 25 20 25 25 12 20 15 23 16 18 18 13 24 22 18 13 17 20 24 20 15 18 12 22
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