Last year the average corn production rate in eastern Kansas

Last year the average corn production rate in eastern Kansas was 95.6 bushels per acre. A county agricultural agent wanted to determine if this year’s rate has increased. He collected information from 25 different corn growers and found a sample mean of 97.3 bushels per acre with a standard deviation of 5.1 bushels. What is the value of the test statistic?

A             0.054

B             1.645

C             1.667

D             1.960

E              2.335

Solution

As

t = (x - u) * sqrt(n) / s

Then

t = (97.3 - 95.6) * sqrt(25) / 5.1

t = 1.666666667 [ANSWER, C]