Find the following confidence intervals for d, assuming that the populations of paired differences are normally distributed.

Question:

Find the following confidence intervals for d, assuming that the populations of paired differences are normally distributed.
a. n = 11, = 25.4, sd = 13.5, confidence level = 99%
b. n = 23, = 13.2, sd = 4.8, confidence level = 95%
c. n = 18, = 34.6, sd = 11.7, confidence level = 90%