n the FBI promotion system, last year's decoration points had a standard deviation equivalent ...

     Testing a   Claim about a Standard Deviation or Variance   In the FBI promotion system,   last year's decoration points had a standard deviation equivalent to 7.1.   This year 27 of the tested individuals had scores with a standard deviation   of 4.2. Use a 0.01 significance level to test the claim that this year's  testers have less variation than last year's testers. Does a lower standard   deviation suggest that this year, people are holding better decoration   points?