Question 1063029: Grip and Leg Strength. In the paper, “Sex Differences in Static Strength and Fatigability in Three Different Muscle Groups” (Research Quarterly for Exercise and Sport, Vol. 61(3), pp. 238–242), J. Misner et al. published results of a study on grip and leg strength of males and females.
The following data, in newtons, is based on their measurements of right-leg strength.
Male
2632
1796
2256
2235
2298
1917
1105
1926
2644
1569
3129
2167
1977
Female
1344
1351
1369
2479
1573
1665
1791
1866
1544
2359
1694
2799
1868
2098
part A Question.Preliminary data analyses indicate that you can reasonably presume leg strength is normally distributed for both males and females and that the standard deviations of leg strength are approximately equal.
a. At the 5% significance level, do the data provide sufficient evidence to conclude that mean right-leg strength of males exceeds that of females? (Note: . x1 = 2127, s1 = 513,. x2 = 1843, and s2 = 446.)
b. Estimate the P-value of the hypothesis test, and use that estimate and table 9.12
P-value
P >0.10
0.05
0.01
P ≤ 0.01
Evidence against H0
Weak or none
Moderate
Strong
Very strong
assess the strength of the evidence against the null hypothesis.
part B Question.Determine a 90% confidence interval for the difference between the mean right-leg strengths of males and females. Interpret your result.
Answer by ikleyn(52799)   (Show Source):
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