Answer:
64
Step-by-step explanation:
You need help with all of them or one in specific?
Answer:
13
Step-by-step explanation:
100 total points
3 4
9 8
12 12
15 16
18 20
21 24
24 28
27 32
30 36
33 40
36 44
39 48
42 52
45
48
Answer:33
Step-by-step explanation:
trust
Answer:
The probability that the average age of a randomly selected sample of 100 students will be less than 21.8 years is 0.159
Step-by-step explanation:
According to the given data we have the following:
mean = μ= 22
standard deviation = σ = 2
n = 100
μx = 22
σx=σ/√n=2/√100=0.2
Therefore, P( x < 21.8)=P(x-μx)/σx<(21.8-22)/0.2
=P(z<-1)
= 0.159
The probability that the average age of a randomly selected sample of 100 students will be less than 21.8 years is 0.159
