Question

FREE 70 POINTS "what is the mean weight of the group of men? express your answer in decimal form."

Answer 1

mean weight = 70.6 Kg

Explanation:

mean is calculated as

mean =
`(sum)/(count)`

From the stem and leaf plot , using the data for men with Key 4/2 = 42

sum for stem of 6

= 4(65) + 2(66) + 67 + 68 + 2(69)

= 260 + 132 + 67 + 68 + 138

= 665

sum for stem of 7

= 72 + 2(73) + 2(74) + 2(75) + 76 + 77 + 78

= 72 + 146 + 148 + 150 + 76 + 77 + 78

= 747

Then total sum = 665 + 747 = 1412

the count ( number of men ) = 20

Then

mean =
`(1412)/(20)` = 70.6 Kg