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 = 12, = 17.5, sd = 6.3, confidence level = 99%
b. n = 27, = 55.9, sd = 14.7, confidence level = 95%
c. n = 16, = 29.3, sd = 8.3, confidence level = 90%