Answer:
The sample size is 1875.
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:
Sampling error of 0.03.
This means that 
99.74% confidence level
So 
, z is the value of Z that has a pvalue of 
, so 
.
25% of all adults had used the Internet for such a purpose
This means that 
What is the sample size
The sample size is n. So
Simplifying by 0.03 both sides
The sample size is 1875.
C is the answer. Hope that helps C:lol
<h2>
Answer:</h2>
950
<h3>
Step-by-step explanation:</h3>
V = h··r²
10 × 3.14 = 31.4
31.4 × 5.5² = 949.85
949.85, rounded equals 950
We will evaluate both expressions step by step.
Sylvia's espression:
h + 0.05h
h: Original hat price.
0.05h: Increase of 5% due to sales tax.
Jin's expressions:
1.05h
h: Original hat price.
1.05: Factor for which you must multiply the original price to add 5% due to sales tax.
Answer:
I think the answer is 6 3/4.
Step-by-step explanation:
