Answer:
e. All of the reasons are correct.
Step-by-step explanation:
In most cases, studying all the population is impossible. In other cases, it is too expensive or time consuming.
A sample will give us, in most cases and combined with tools of statistical analysis (hypothesis testing or confidence intervals), enough information to make an unbiased estimation about the characteristic of the population we are studying.
Answer:
Yes it is
Step-by-step explanation:
Answer:
x = t - 
Step-by-step explanation:
Given
t = x +
( isolate x by subtracting
from both sides )
t -
= x
Well

is $6 per magazine and 6 is a multiple of 3, so that's a possibility.<span />
Answer:
On the 7th day.
Step-by-step explanation:
The mold doubles, so on the 7th day, the mold would be half-there.
I used the 8th day's description to figure this out.