question archive A random sample of 12 graduates of a secretarial school typed on the average ?=78
A random sample of 12 graduates of a secretarial school typed on the average ?=78
Subject:MathPrice: Bought3
A random sample of 12 graduates of a secretarial school typed on the average ?=78.2 word
per minute with a standard deviation s=7.9 word per minute. Assuming that such data can be looked upon as a random sample from a normal population, use the one-sample t-test to test the null hypothesis µ=80 word per minute against the alternative hypothesis µ≤80 word per minute for graduates of this secretarial school. Use the 0.05 level of significance. (note the HA is less than 80 word per minute)
