It would take you 15 minutes
Answer:
The minimum sample size required to create the specified confidence interval is 2229.
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 .
So it is z with a pvalue of , so
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.
What is the minimum sample size required to create the specified confidence interval
This is n when
Rounding up
The minimum sample size required to create the specified confidence interval is 2229.
Answer:
(4,−5)
Step-by-step explanation:
Well you will just subtract 91 - 7 which equals 84.
So 7 + 84 = 91
2.4 ÷ 8= 0.3
The decimal stays the same.
Hoped this helped.
~Bob Ross®