How large would sample size have to be-cut margin of error
A survey was conducted of the age in years of 50 randomly selected customers. The mean was 27.47 years with a standard deviation of 10.69 years.
About how large would the sample size have to be to cut the margin of error by a factor of 4?
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The mean was 27.47 years with a standard deviation of 10.69 years. About how large would the sample size have to be to cut the margin of error by a factor of 4?
If the company meets its target net income number, by what percentage could its sales fall before it is operating at a loss? That is, what is its margin of safety ratio? (Round your answer to 1 decimal place, e.g. 25.4.)
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A meteorologist who sampled 13 thunderstorms found that the average speed at which they traveled across a certain state was 15 miles per hour. The standard deviation of the sample was 1.7 miles per hour. Find the 99% confidence interval of the me
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