Answer:
hope it helps
Step-by-step explanation:
x. f. = fx
0.5* 5=. 2.5
1.5* 28 = 37.5
2.5*32 =80
3.5*26=91
4.5*9=40.5
total fx = 251.5
mean = total fx/ N
= 251.5/100
= 2.515
