Question

Consider the following data from two independent samples with equal population variances. Construct a 95% confidence interval to estimate the difference in population means. Assume the population variances are equal and that the populations are normally distributed. x?1 = 68.4 x?2 = 74.5 s1 = 12.6 s2 = 8.2 n1 = 10 n2 = 15 The 95% confidence interval is ( , ). (Round to two decimal places as needed.)

          Consider the following data from two independent samples with equal population variances. Construct a 95% confidence interval to estimate the difference in population means. Assume the population variances are equal and that the populations are normally distributed.

x?1 = 68.4 x?2 = 74.5
s1 = 12.6 s2 = 8.2
n1 = 10 n2 = 15

The 95% confidence interval is ( , ).
(Round to two decimal places as needed.)

Consider the following data from two independent samples with equal population variances. Construct a 95% confidence interval to estimate the difference in population means. Assume the population variances are equal and that the populations are normally distributed.

x?1 = 68.4 x?2 = 74.5
s1 = 12.6 s2 = 8.2
n1 = 10 n2 = 15

The 95% confidence interval is ( , ).
(Round to two decimal places as needed.)

Added by Dennis E.

Elementary Statistics a Step by Step Approach

Allan G. Bluman 9th Edition

Instant Answer

Solved by Expert Adi S

02/15/2023

Step 1

This is simply the square root of the population size. In this case, the population standard deviation is 12.6. Show more…

Show all steps

Thanks for your feedback!

Consider the following data from two independent samples with equal population variances. Construct a 95% confidence interval to estimate the difference in population means. Assume the population variances are equal and that the populations are normally distributed. x̄1 = 68.4, x̄2 = 74.5, s1 = 12.6, s2 = 8.2, n1 = 10, n2 = 15. The 95% confidence interval is ( , ). (Round to two decimal places as needed.)