# Sample Size

If 90 out of 120 people asked said they were in favor of cloning, what is the interval that would make you 99% confident that it includes the proportion of people in the entire population that would be in favor of cloning? Given the data in problem above, what sample size would you need to have in order to have a 95% confidence interval with an error term of .04?

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#### Solution Preview

If 90 out of 120 people asked said they were in favor of cloning, what is the interval that would make you 99% confident that it includes the proportion of people in the entire population that would be in favor of cloning? Given the data in problem above, what sample size would you need to have in order to have a 95% confidence interval with an error term of .04?

99% Confidence limits for proportions=

p= 75.00% =90/120

q=1-p= 25.00%

n=sample size= 120

sp=standard ...

#### Solution Summary

The solution calculates the value of sample size for a given confidence interval and an error term.