Answer:
true
Step-by-step explanation:
There is no distribution (unless you count substitution) in the second set of terms.
Edit: I think I get what your question is now. You are supposed to distribute to every term inside the parenthesis (false)
Answer:
ldk
Step-by-step explanation:
sorry
The answer will be 2 cuz you multiply them at the answers
Answer:
The minimum sample size needed is 125.
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:
For this problem, we have that:
99% confidence level
So , z is the value of Z that has a pvalue of , so .
What minimum sample size would be necessary in order ensure a margin of error of 10 percentage points (or less) if they use the prior estimate that 25 percent of the pick-axes are in need of repair?
This minimum sample size is n.
n is found when
So
Rounding up
The minimum sample size needed is 125.