The reciprocal of a number x is 1/x
The reciprocal of 5 is 1/5
The reciprocal of 6/11 is 1/6/11 = 11/6
Answer:
A 4/10
B 5/10
Step-by-step explanation:
A because there are 4 out of the 10 that are red
B because there 5 out of the 10 that are not blue
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.
The answer for the last one is-36