Question

View Favorites Tools Help Best of the Web e Centricity RIS-IC Login West LA Connection () Meth227 Winter2019 Homework: 2.3 Score: 0 of 1 pt 32.3.49 The heights (in inches) of 19 female students in a physical education class are shown below Approxirmate the mean height of students in a class Frequency Height (in inches) 60-62 63-65 66-68 69-71 Enter your answer in the answer box and then click Check Answer Clear

Answer 1

We'll first have to make the inclusive gruops.

Height	Frequency
59.5 - 62.5	4
62.5 - 65.5	6
65.5 - 68.5	8
68.5 - 71.5	1

Now we have to find out midpoint of each class and multiply it with the respective frequency.

Height	Midpoint (m)	Frequency (f)	fm
59.5-62.5	61	4	244
62.5-65.5	64	6	384
65.5-68.5	67	8	536
68.5-71.5	70	1	70
Total		19	1234

Hence, the mean is

$\bar X = \frac{\sum { fm}}{\sum{f}}=\frac{1234}{19}=64.947$