The degenerative disease osteoarthritis most frequently affects weight-bearing joints such as the knee. An article presented the following summary data on stance duration (ms) for samples of both older and younger adults.Age Sample Size Sample Mean Sample SDOlder 29 809 116Younger 18 770 71Assume that both stance duration distributions are normal. (a) Calculate a 99% CI for true average stance duration among elderly individuals. (Round your answers to one decimal place.) , msCalculate the test statistic and determine the P-value. (Round your test statistic to one decimal place and your P-value to three decimal places.)t = P-value =

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Description: The degenerative disease osteoarthritis most frequently affects weight-bearing joints such as the knee. An article presented the following summary data on stance duration (ms) for samples of both older and younger adults.Age Sample Size Sample

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The degenerative disease osteoarthritis most frequently affects weight-bearing joints such as the knee. An article presented the following summary data on stance duration (ms) for samples of both older and younger adults.

Age		Sample Size		Sample Mean		Sample SD
Older		29		809		116
Younger		18		770		71

Assume that both stance duration distributions are normal.

(a) Calculate a 99% CI for true average stance duration among elderly individuals. (Round your answers to one decimal place.)

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.)

t	=
P-value	=

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