Answer:
A sample size of 79 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
.
For this problem, we have that:

The margin of error is:
95% confidence level
So
, z is the value of Z that has a pvalue of
, so
.
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 0.09?
A sample size of n is needed.
n is found when M = 0.09. So






Rounding up to the nearest whole number.
A sample size of 79 is needed.
-5t2 + 40t = 0
5t(-t+ 8) = 0
5t = 0 or t = 8
Answer:
I think that it is B because its the only answer that makes sense
Step-by-step explanation:
It would be 1 square inch. You can't make a trapezoid cause if you tried to it would turn into a square.
Answer:
2 3 1 3
Step-by-step explanation: