### Hypothesis

1 Identify H0 and H1 The mean top of knee height of a sitting male is 20.7 in. 2 Identify H0 and H1 High school teachers have incomes with a standard deviation that is less than $20,000. 3 Find critical values Two-tailed test; a =0.01. 4 Find critical values Left-tailed test; a =0.05. 5 Find critical values