22. The average income in a certain area is assumed to be approximately $25,000. A sample of size n = 30 gives a mean of
Posted: Wed Jul 06, 2022 10:05 am
22. The average income in a certain area is assumed to be approximately $25,000. A sample of size n = 30 gives a mean of $22,000 and a sample standard deviation of $7,000. Compute the test statistic. a. .43 b. -2.31 C. -.43 d. -2.35