Is your favorite TV program often interrupted by advertising? CNBC presented statistics
on the average number of programming minutes in a half-hour sitcom (CNBC, February
23, 2006). The following data (in minutes) are representative of their findings.

21.0621.6623.8221.5220.0222.3723.36 22.2421.2320.321.9122.222.1923.4420 .6223.8621.5223.1421.222.34
21.06
21.66
23.82
21.52
20.02
22.37
23.36


22.24
21.23
20.3
21.91
22.2
22.19
23.44


20.62
23.86
21.52
23.14
21.2
22.34


Assume the population is approximately normal. Provide a point estimate and a 95% confidence
interval for the mean number of programming minutes during a half-hour television
sitcom.