Question

Calculate the mean for the following frequency distribution: Class 10-30 30-50 50-70 70-90 90-110 frequency 15 18 25 10 2

Answer 1

Answer:

Step-by-step explanation:

Xi = 20        40    60     80    100                    total

Fi =  15          18    25     10       2                         70

XiFi = 300  720  1500  800  200                    3520

 Mean = ∑XiFi/∑Fi

            =  3520/70

              = 50.28

Answer 2

Answer:

Mean of the distribution is 50.29          

Step-by-step explanation:

Given Continuous Frequency Distribution  table

To find: Mean

Table is attached

Means , $\overline{x}=\frac{\sum x_if_i}{\sum f_i}$

$\overline{x}=\frac{3520}{70}$

        = 50.29

Therefore, Mean of the distribution is 50.29