Given two independent random samples with the following results:

n1

=11

x-1

=118

s1

=18

n2

=17

x2

=155

s2

=13

Use this data to find the 99%

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 3 of 3:

Construct the 99%

confidence interval. Round your answers to the nearest whole number.