Find the mean of the following frequency distribution:
Class interval 7-14 14-21 21-28 28–35
Frequency
5 11 20 7
35–42
18 1
42-49
9
Answers
Answer:
The ans for the question is given above
Mean =29.4
Answer:
Mean = 29.4
Step-by-step explanation:
We are given the following frequency distribution below;
Class Interval Frequency (f) X X*f
7 - 14 5 10.5 52.5
14 - 21 11 17.5 192.5
21 - 28 20 24.5 490
28 - 35 7 31.5 220.5
35 - 42 18 38.5 693
42 - 49 9 45.5 409.5
∑f = 70 ∑X*f = 2058
Mean of the data, X bar =
= = 29.4
Therefore, mean of the following frequency distribution is 29.4 .