Answer:
a. 11.76
b. 21.113
Step-by-step explanation:
x
13.2
5
10.2
17.5
12.9
a)
arithmetic mean=sumx/n
arithmetic mean=(13.2+5+10.2+17.5+12.9)/5=58.8/5=11.76
Thus, the arithmetic mean return is 11.76.
b)
Variance=sum(x-xbar)^2/n-1
x x-xbar (x-xbar)^2
13.2 13.2-11.76=1.44 2.0736
5 5-11.76=-6.76 45.6976
10.2 10.2-11.76=-1.56 2.4336
17.5 17.5-11.76=5.74 32.9476
12.9 12.9-11.76=1.14 1.2996
sum(x-xbar)^2=2.074+45.698+2.434+32.948+1.3=84.452
Variance=84.452/4=21.113
Thus, variance is 21.113.
