Question

Given two independent random samples with the following results:

n1=16 x‾1=170 s1=23   n2=9 x‾2=152 s2=21

Use this data to find the 80% confidence interval for the true difference between the population means. Assume that the population variances are equal and that the two populations are normally distributed.

Step 1 of 3:

Find the point estimate that should be used in constructing the confidence interval.

Step 2 of 3:

Find the margin of error to be used in constructing the confidence interval. Round your answer to six decimal places.

Step 3 of 3:

Construct the 80%80% confidence interval. Round your answers to the nearest whole number.

Answer 1