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
Okay, I understand. You found the correct answer. I won't get points. Sniffle.Sniffle.
Likely best describes the likelihood of the probability 2/3. It is not completely certain, nor is it unlikely, and it definitely cannot be impossible.
6+4• (5-7)^2
(5-7)^2
-2^2
4
6+4+4
=14
In symbols, sqrt(648) = 2^a * 3^b.
One way in which to tackle this is to factor *648.
648 = 81*8.
Note that 81 = 3^4 and that 8 = 2^3.
Therefore, a = 4 and b = 3.