The number of bushels of corn per acre for a certain hybrid planted by farmers during the year was tabulated. The results are shown in a frequency distribution below. Find the mean number of bushels per acre. Please round your answer to the nearest integer.
A) mean = 145 bu/acre
B) mean = 133 bu/acre
C) mean = 138 bu/acre
D) mean = 144 bu/acre
E) mean = 147 bu/acre

Question

The number of bushels of corn per acre for a certain hybrid planted by farmers during the year was tabulated. The results are shown in a frequency distribution below. Find the mean number of bushels per acre. Please round your answer to the nearest integer. 
A) mean = 145 bu/acre 
B) mean = 133 bu/acre 
C) mean = 138 bu/acre 
D) mean = 144 bu/acre 
E) mean = 147 bu/acre

Quizplus · Accepted Answer

To find the mean, we need to multiply each class midpoint by its frequency, add up those products, and then divide by the total number of data points. Using this formula, we get:

Mean = (140*8 + 135*12 + 130*10 + 125*6 + 120*4) / (8+12+10+6+4) = 138

Therefore, the mean number of bushels per acre is 138 (choice C).

The Number of Bushels of Corn Per Acre for a Certain