Question

rk Ass ghment Chapter 10 Exercise 10-17 Algo A consumer advocate researches the length of ife 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 ttable) 25 24 17 1335 13 2117 27 13 18 23 2 16 12 16 13 16 23 13 24 Micrósoft Edge 腮沙! ei:: a曲闕咁白#困な汀@ here to search

Answer 1

Here

and

The test statistic can be written as

which under H₀ follows a standard normal distribution.

Now,

The value of the test statistic