Question

Approximate the mean of the grouped data. OA. 13 O B. 150 Round to the nearest whole number. O C. 146 Weight (in pounds) Frequency 135-139 140-144 145-149 150-154 155-159 2 9 O D. 148 19 5 20 Click to select your answer
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Answer #1
Midpoints (X) Frequency(f) Freq*X
137 9 1233
142 19 2698
147 11 1617
152 5 760
157 20 3140
Total -> 64 9448

Mean = Sum of (fx) / Sum of f

= 9448 / 64

= 147.625

~ 148

Answer = Option (d)

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