2. -4 points DevoneStat9 9.E.061 My Notes Ask Your Teac As the population ages,
ID: 3255429 • Letter: 2
Question
2. -4 points DevoneStat9 9.E.061 My Notes Ask Your Teac As the population ages, there is increasing concern about accident-related injuries to the elderly. An article reported on an experiment in which the maximum lean angle-the furthest a subject is able to lean and still recover in one step-was determined for both a sample of younger females (21-29 years) and a sample of older females (67-81 years). The following observations are consistent with summary data given in the article: YF: 28, 34, 32, 27, 28, 32, 31, 35, 32, 29 OF: 17, 16, 23, 13, 12 Carry out a test at significance level 0.10 to see whether the population standard deviations for the two age groups are different (normal probability plots support the necessary normality assumption).Explanation / Answer
We are given,
s1 = 29
s2 = 54
The test statistics:
F = (s1^2/s2^2)
= (29^2/54^2)
= 0.29
Answer:
f = 0.29
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