Answer:7/8
Step-by-step explanation:
It is 7/8 because it is the fraction that is closest to a whole number
Answer:
D. 31
Step-by-step explanation:
We have that to find our
level, that is the subtraction of 1 by the confidence interval divided by 2. So:

Now, we have to find z in the Ztable as such z has a pvalue of
.
That is z with a pvalue of
, so Z = 1.96.
Now, find the margin of error M as such

In which
is the standard deviation of the population and n is the size of the sample.
A previous study indicated that the population standard deviation is 2.8 days.
This means that 
How large a sample must be selected if the company wants to be 95% confident that the true mean differs from the sample mean by no more than 1 day?
This is n for which M = 1. So





Rounding up, at least 31 people are needed, and the correct answer is given by option D.
The normally had small extended families.
They were a hunter-gatherer community
Sioux and Cheyenne tribes hunted buffalo
They were nomadic and almost completely dependent on buffalo
Marcus sold 8 cups of lemonade and 3 bags of peanuts. 0.75 times 8 equals $6.00. 0.35 times 3 equals $1.05. $6.00+ $1.05= $7.05. Your welcome