Question

# A sample of scores for men and women from an examination in Statistics 201 were: Men...

A sample of scores for men and women from an examination in Statistics 201 were:

 Men 62 91 92 77 69 86 64 60 94 Women 51 79 62 88 80 50 87 65

Given that the null hypothesis and the alternative hypothesis are:

H0: μm - μw = -5
H1: μm - μw ≠ -5

and using a 0.05 significance level conduct a t-test about a difference in population means:

a) What is the correct decision rule?
 Reject H0 in favour of H1 if the computed value of the statistic is between -2.131 and 2.131. Reject H0 in favour of H1 if the computed value of the statistic is less than 2.131. Reject H0 in favour of H1 if the computed value of the statistic is greater than 2.131. Reject H0 in favour of H1 if the computed value of the statistic is less than -2.131 or greater than 2.131. None of the above.

b) Compute the pooled variance.
For full marks your answer should be accurate to at least four decimal places.

Pooled variance: 0

c) Compute the value of the test statistic.
For full marks your answer should be accurate to at least three decimal places.

Test statistic: 0

d) What is your decision regarding H0?
 There is sufficient evidence, at the given significance level, to reject H0, and accept H1 or at least there is not enough evidence to reject H1. There is insufficient evidence, at the given significance level, to reject H0. There is insufficient evidence to reject or not reject the null hypothesis.

a)

Reject H0 in favour of H1 if the computed value of the statistic is less than -2.131 or greater than 2.131.

b)

pooled variance =212.0704

c)

test statistic =1.692

d) There is insufficient evidence, at the given significance level, to reject H0.