Question

Find the combined mean of the following data:

Group I

Group II

X₁ = 2100

X₂ = 1500

n₁ = 100

n₂=200.​

Answer 1

Answer:

mean of data is- 12

Explanation:

x1+ x2 = (2100+1500) = 3600

n1+n2= (100+200) = 300

since mean= sum of data/ sum of observation

here the solution = (x1+x2)/(n1+n2) = 3600/300 = 12