The time spent watching television of 121 women between the

Solution

Variance for time spent watching telelvision by 121 women between the ages of 55 and 64 = 42 m

Or s1² = 42 m.

while for 15 to 34 is s2²= 56

H0: var i = var ii

Ha: var1<var2

Left tailed hypothesis test for variances.

Test statistic = s1^2/s2^2 = 42/56 = 0.75

p value for left tailed t test = .227361.

The result is not significant at p < .05.

Hence accept null hypothesis and reject the claim that the older women are from a population with a variance less than that for women in the younger group. A= .05 assume samples were randomly selected from normal populations