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Data show that men between the ages of 20 and 29 in a general population have...

Data show that men between the ages of 20 and 29 in a general population have a mean height of 69.3​ inches, with a standard deviation of

2.7 inches. A baseball analyst wonders whether the standard deviation of heights of​ major-league baseball players is less than

2.7 inches. The heights​ (in inches) of 20 randomly selected players are shown in the table.

  1. What are the null and alternative​ hypotheses?
  2. Calculate the value of the test statistic.
  3. Use technology to determine the​ P-value for the test statistic.
  4. What is the correct conclusion at the α=0.01 level of​ significance?

Math   Statistics-And-Probability   
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