Question:

The mean blood cholesterol level for all men aged 20 – 34 years is \[\mu =188mg/dl\]. We suspect that the mean for cross-country runners is lower. State hypotheses, use the information in exercise II.6 (below) to find the test statistic, and five the P-value. Is the result significant at the a = 0.10 level? At a = 0.05? At a = 0.01?