Question

35. Find the mean of the following data:
Class
200-299 300 - 399 400 - 499 500 - 599 600 - 699 700 - 799 800-8
48.
Frequency
118
139
126
151
2​

Answer 1

Answer:

i think there is some mistake

there are 7 classes but frequencies are only six

i hope it helps you

Step-by-step explanation:

to solve this firstly take out the mid points of class intervals by using the formula

(upper limit +lower limit )/2

in this case in first class

(299+200)/2 = 499/2 = 249.5

after finding all mid points

find the product of midpoints and frequencies

like that 249.5 x 48 =11976

find the sum of all product of midpoint and frequencies

and find the sum of all frequencies

now apply median formula

which is sum of all product of midpoint and frequencies divided by sum of all frequencies