question 8

~ 22 days 0/15 QUESTION 8 . 1 POINT Clarence, a typist, has a sample typing speed mean of 75.2 words per minute from 18 trials. Clarence still claims that his average typing speed is 84 words per minute, and the low average can be attributed to chance. At the 5% significance level, does the data provide sufficient evidence to conclude that Clarence's mean typing speed is less than 84 words per minute? Given the sample data below, accept or reject the hypothesis. . Ho : u = 84 words per minute; Ha : u