Provided below are summary statistics for independent simple random samples from two populations. Use the pooled t-test and the pooled t-interval procedure to conduct the required hypothesis test and obtain the specified confidence interval.

x1=12, s1=2.2, n1=11, x2=13, s2=2.2, n2=11

a. Two-tailed test, =0.05

b.95% confidence interval

Next, compute the test statistic.

a. t=

Finally, determine the P-value.

b. P =

C. The 90% confidence interval is from= ........ to .......