Question: A physician claims that joggers' maximal volume oxygen uptake is greater than the average of all adults. A sample of 15 joggers has a mean of 43.6 milliliters per kilogram (ml/kg) and a standard deviation of 6 ml/kg. If the average of all adults is 36.7 ml/kg, is there enough evidence to support the physician's claim at α = 0.05?" (Bluman, 1998, p. 381).

First, identify the alternative and the null hypotheses.

Secondly, calculate the critical value and df.

1. Explain which number is the null and which is the alternative.
2. To get the DF the formula is N-1 and how do you get the critical value, which is located in the back of the book.
3. \[t =\frac{\bar{X}-\mu }{s / \sqrt{n}}\]
4. Explain whether the null hypothesis needs to be rejected or accepted

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