DEVORESTAT9 9.2.028.5.

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 farthest 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: 29, 35, 31, 27, 28, 32, 31, 34, 32, 29

OF: 19, 15, 21, 13, 12

Does the data suggest that true average maximum lean angle for older females (OF) is more than 10 degrees smaller than it is for younger females (YF)? State and test the relevant hypotheses at

significance level 0.10. (Use , for younger females and #₂ for older females.)

Hoi H₁ H₂O

Mo 1-₂-10

H₂H₁-H₂> 10

ⒸH²H₁-H₂10

H₂H₁₂ <10

ⒸHM₁₂0

H₂H₂-H₂>0

P-value-

Calculate the test statistic and determine the P-value. (Round your test statistic to one decimal place and your P-value to three decimal places.)

tm

MY NOTES

State the conclusion in the problem context.

Fall to reject M. The data suggests that true average lean angle for older females is more than 10 degrees smaller than that of younger females.

Fail to reject Ho. The data suggests that true average lean angle for older females is not more than 10 degrees smaller than that of younger females.

Reject Ho. The data suggests that true average lean angle for older females is not more than 10 degrees smaller than that of younger females.

Reject Ho. The data suggests that true average lean angle for older females is more than 10 degrees smaller than that of younger females.

Fig: 1