find the mean and variance of the following data:
no of units 0-10 10-20 20-30 30-40 40-50 50-60
no of schools 6 12 22 26 16 18
Answers
Answer:
0 10 36488c and 003938 5648489
Answer:
Step-by-step explanation:
no.of units X(mid) f fx
0-10 5 6 30
10-20 15 12 180
20-30 25 22 550
30-40 35 26 910
40-50 45 16 720
50-60 55 18 990
100 3380
Mean = ∑ fx /f
= 3380 /100
= 33.80