1. The mean weight of all 30-year-old women is 136 pounds. A random sample of 40 women who are 30 years old showed a sample mean of 137 pounds with a standard deviation of 19 pounds. Determine whether the mean weight of 30-year old women is significantly less than 136, using a significance level of 0.05.

Find the p-value.

2. The mean weight of all 30-year-old women is 136 pounds. A random sample of 40 women who are 30 years old showed a sample mean of 137 pounds with a standard deviation of 19 pounds. Determine whether the mean weight of 30-year old women is significantly less than 136, using a significance level of 0.05.

Make a decision about the null hypothesis and a conclusion about the claim.

a) None of these answers.

b) Fail to reject Ho. There is not enough evidence to reject the claim.

c) Reject Ho. There is not enough evidence to support the claim.

d) Reject Ho. There is enough evidence to support the claim.

e) Fail to Reject Ho. There is not enough evidence to support the claim.

3. The mean weight of all 30-year-old women is 136 pounds. A random sample of 40 women who are 30 years old showed a sample mean of 137 pounds with a standard deviation of 19 pounds. Determine whether the mean weight of 30-year old women is significantly less than 136, using a significance level of 0.05.

Find 99% confidence interval.

a) None of these answers.

B) (128.86, 145.14)

C) (127.73, 145.81)

D) (130.92, 143.08)

E) (131.94, 142.06)