Where are the numbers or just this? We need numbers like 1 0 6
There u go tried my best to work it out!! :))
Answer:
E
Step-by-step explanation:
its the only one that make sense
Answer:
Option c -2.8571
Step-by-step explanation:
z-score are calculated as
.
We are given that mean=120 and standard deviation=S.D=35 as X~N(120,35).
Sample size=n=25.
We have to find z-score for x-bar=100. So,
z-score=[100-120]/[35/√25]
z-score=[-20]/[35/5]
z-score=-20/7
z-score=-2.8571.
Thus, the z-score associated with x-bar = 100 is -2.8571.
Step-by-step explanation:

But we know that

and

so this leaves us with just
