Answer:
A sample size of 657 is needed.
Step-by-step explanation:
In a sample with a number n of people surveyed with a probability of a success of , and a confidence level of , we have the following confidence interval of proportions.
In which
z is the zscore that has a pvalue of .
The margin of error is:
95% confidence level
So , z is the value of Z that has a pvalue of , so .
In the past, 19% of all homes with a stay-at-home parent had the father as the stay-at-home parent.
This means that
(a) What sample size is needed if the research firm's goal is to estimate the current proportion of homes with a stay-at-home parent in which the father is the stay-at-home parent with a margin of error of 0.03?
A sample size of n is needed.
n is found when
Then
Rounding up to the nearest whole number.
A sample size of 657 is needed.
Answer:
542 miles
Step-by-step explanation:
St. Paul to Madison, Wisconsin = 260 miles
St Paul to Bismarck, North Dakota = 437 miles
4 round trips to Madison = 4 * 2 * 260 = 2080 miles
3 round trips to Bismarck = 3 * 2 * 437 = 2622 miles
Difference in miles traveled :
2622 miles - 2080 miles = 542 miles
Use the formula
1/3*pi*r^3*h=Volume
It is simple algebra
The volume of the tank of water is 653.12 cubic meters.
<h3>
How to get the volume?</h3>
For a cylinder of height H and diameter D, the total volume is given by:
In this case, we know that:
D = 8m
H = 13m
Replacing that in the above equation:
So the volume of the tank of water is 653.12 cubic meters.
If you want to learn more about volumes:
brainly.com/question/9554871
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