(Use Excel) A consumer advocate researches the length of life between two brands
ID: 3174431 • Letter: #
Question
(Use Excel) A consumer advocate researches the length of life between two brands of refrigerators, Brand A and Brand B. He collects data on the longevity of 40 refrigerators for Brand A and repeats the sampling for Brand B. These data are measured in years. Use Table 1.
Specify the competing hypotheses to test whether the average length of life differs between the two brands.
Using the appropriate commands in Excel, find the value of the test statistic. Assume that A2 = 5.0 and B2 = 6.1. What is the p-value? (Negative values should be indicated by a minus sign. Do not round intermediate calculations. Enter "Test statistic" value in 2 decimal places and "p-value" in 4 decimal places.)
(Use Excel) A consumer advocate researches the length of life between two brands of refrigerators, Brand A and Brand B. He collects data on the longevity of 40 refrigerators for Brand A and repeats the sampling for Brand B. These data are measured in years. Use Table 1.
Explanation / Answer
a) To test whether the average length of life differs between the two brands.
H0: 1 2 = 0;
HA: 1 2 0
alpha:5%
b)
Assume that A2 = 5.0 and B2 = 6.1.
sample mean for Brand A is 17.54
and sample mean for brand B is 18.82
z=-2.397
Now P value= 0.0165
Conclusion:
P<0.05, we reject the H0. Hnece there is evidence that the average life differs between the brands
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.