The personnel office recently produced a set of aptitude test questions designed to determine whether a potential employee can be a good salesperson.

The test was tried on current employees before it was used for future employees. The test scores on employees in three different departments are listed here. Do the tests generate different scores for different departments?

Do a 5 % test.

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Accounting 78 79 80 72 87 98 Department Sales 85 87 89 79 99 95 Production 76 77 97 71 81 79