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A simple random sample of 400 individuals provides 100 Yes responses.
 
a. What is the point estimate of the proportion of the population that would provide Yes responses (to 2 decimals)?
 
b. What is your estimate of the standard error of the proportion (to 4 decimals)?
 
c. Compute the 95% confidence interval for the population proportion (to 4 decimals).

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12 Mar 2021
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Related textbook solutions

Introductory Statistics
OER Edition, 2013
Openstax
ISBN: 9781938168208

Related questions

A population has a mean of 200 and a standard deviation of 50. Suppose a simple random sample of size 100 is selected and is used to estimate µ.
 
(a) What is the probability that the sample mean will be within +/- 5 of the population mean (to 4 decimals)?
(b) What is the probability that the sample mean will be within +/- 10 of the population mean (to 4 decimals)?

A simple random sample of 60 items resulted in a sample mean of 80. The population standard deviation is 15 .

a. Compute the 95% confidence interval for the population mean. Round your answers to one decimal place.
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b. Assume that the same sample mean was obtained from a sample of 120 items. Provide a 95% confidence interval for the population mean. Round your answers to two decimal places.
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c. What is the effect of a larger sample size on the interval estimate?

Larger sample provides a  margin of error.
 

a simple random sample of 60 items resulted in a sample mean of 80. The population standard deviation is  15.

  1. Compute the 95% confidence interval for the population mean.

  2. Assume that the same sample mean was obtained from a sample of 120 items. Provide

    a 95% confidence interval for the population mean.

  3. What is the effect of a larger sample size on the interval estimate?

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