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In a random sample of 150 customers of a high-speed
Chapter 5, Problem 12E(choose chapter or problem)
In a random sample of 150 customers of a high-speed internet provider, 63 said that their service had been interrupted one or more times in the past month.
a. Find a 95% confidence interval for the proportion of customers whose service was interrupted one or more times in the past month.
b. Find a 99% confidence interval for the proportion of customers whose service was interrupted one or more times in the past month.
c. Find the sample size needed for a 95% confidence interval to specify the proportion to within \(\pm\)0.05.
d. Find the sample size needed for a 99% confidence interval to specify the proportion to within \(\pm\)0.05.
Equation transcription:
Text transcription:
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Questions & Answers
QUESTION:
In a random sample of 150 customers of a high-speed internet provider, 63 said that their service had been interrupted one or more times in the past month.
a. Find a 95% confidence interval for the proportion of customers whose service was interrupted one or more times in the past month.
b. Find a 99% confidence interval for the proportion of customers whose service was interrupted one or more times in the past month.
c. Find the sample size needed for a 95% confidence interval to specify the proportion to within \(\pm\)0.05.
d. Find the sample size needed for a 99% confidence interval to specify the proportion to within \(\pm\)0.05.
Equation transcription:
Text transcription:
\pm
ANSWER:Answer:
Step 1 of 5:
Suppose that, a random sample of 150 customers of a high-speed internet provider, 63 said that their service had been interrupted one or more times in the past month.
Here,
x = 63, n = 150