New software companies that create programs for World Wide Web applications believe that average staff age at these companies is 27. To test this two-tailed hypothesis, a random sample is collected:

41, 18, 25, 36, 26, 35, 24, 30, 28, 19, 22, 22, 26, 23, 24, 31, 22, 22, 23, 26, 27, 26, 29, 28, 23, 19, 18, 18, 24, 24, 24, 25, 24, 23, 20, 21, 21, 21, 21, 32, 23, 21, 20

Test, using α = 0.05.