Find the mean of each of the following frequency distributions:
class interval: 25-29 30-34 35-39 40-44 45-49 50-54 55-59
Frequency: 14 22 16 6 5 3 4
Answers
Answer:
Mean = 36.36
Step-by-step explanation:
We are given the mean of following frequency distributions;
Class Interval Frequency (f) X X*f
25-29 14 27 378
30-34 22 32 704
35-39 16 37 592
40-44 6 42 252
45-49 5 47 235
50-54 3 52 156
55-59 4 57 228
∑f = 70 ∑X*f = 2545
Mean of the data, X bar =
= = 36.36
Therefore, mean of given frequency distribution is 36.36 .