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.
Answer:
A. No, because not all of the pairs represent the same ratio
Answer: A) 6x+2
Step-by-step explanation:
I just figured it out
2r+6r=27
8r=27
*divide both side by 8
r=3.75
