Respuesta :
Given:
n = 40, sample size
Confidence level = 99% => z* = 2.58
[tex]\hat{p} = 20\%=0.2[/tex], sample proportion.
By definition, the margin of error is
[tex]z^{*} \sqrt{ \frac{\hat{p}(1-\hat{p})}{n} } = 2.58 \sqrt{ \frac{(0.2)(0.8)}{40} }= 0.1632[/tex]
Answer:
According to Sarah's poll, she can conclude with 99% confidence level that 20% of the high school population is happy with the quality of the cafeteria food, with a margin of error of +/- 16.3%.
n = 40, sample size
Confidence level = 99% => z* = 2.58
[tex]\hat{p} = 20\%=0.2[/tex], sample proportion.
By definition, the margin of error is
[tex]z^{*} \sqrt{ \frac{\hat{p}(1-\hat{p})}{n} } = 2.58 \sqrt{ \frac{(0.2)(0.8)}{40} }= 0.1632[/tex]
Answer:
According to Sarah's poll, she can conclude with 99% confidence level that 20% of the high school population is happy with the quality of the cafeteria food, with a margin of error of +/- 16.3%.
Answer:
The answer is D: 16%
Step-by-step explanation:
I just took the test.
