- Assume the hourly wage rate for a fastgrowing online job is normally distributed with a mean of p. = $27.90. Suppose a random sample of n = 20 workers revealed a mean wage of :E = $28.54 and a standard deviation of s = $1.79. At a = 0.05, is there enough evidence to conclude that the mean hourly wage is more than $27.90? a. Select the appropriate alternative hypothesis, H1 or Ha: u > $28.54 [1'