Answer:
z-test.
Step-by-step explanation:
We want to perform an hypothesis test for a population mean.
In the case that the <u>standard deviation of the population is known</u> and the population distribution is normal, even if the sample is small, <u>we will use a z-test</u>.
The usual case is to not know the standard deviation of the population, in which case a t-test is adequate instead of a z-test, taking into account the degrees of freedom of the sample.
The answer for (1/3)*120 is 40
Answer:
I believe it's D but I'm not 100 percent sure. I hope this helped I'm sorry I couldn't help more <3
Answer:
8 3/25 because 8.12 is 8 12/100 and when you simplify 12/100 you get 3/25
