Twenty-four oat-producing counties were randomly identified from across Minnesota for the purpose of testing the claim The mean oat crop yield rate is greater than

Twenty-four oat-producing counties were randomly identified from across Minnesota for the purpose of testing the claim €œThe mean oat crop yield rate is greater than 60 bushels per acre.€ For each county identified, the yield rate, in bushels of oats per harvested acre, was obtained. The resulting data are listed:

a. Are the test assumptions satisfied? Explain.
b. Complete the test using a = 0.05

Yield 56 31. 80 53 39 59 63 67 56 66 81 61 63 48 53 46 73 85 77 78 72 63 71 77