Answer:
We need a sample size of 564.
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
.
Based upon a 95% confidence interval with a desired margin of error of .04, determine a sample size for restaurants that earn less than $50,000 last year.
We need a sample size of n
n is found when 
So






Rounding up
We need a sample size of 564.
Answer:
<h2>
25326</h2>
Step-by-step explanation:
please refer to the picture above

Answer:
11.2
Step-by-step explanation:
PYTHAGOREAN THEOREM
14^2 = 8.4^2 + x^2

N is the number of leaflets so you just substitute the required number for N.

The cost of printing 2500 leaflets is <span>£</span>7925.