Question

A local police department attempted to estimate the average rat of speed (μ) of vehicles along a strip of Main Street. With hidden radar, the speed of a random selection of 25\ vehicles was measured, which yielded a sample mean of 42 mph and a standard deviation of 6 mph.
a. Estimate the standard error of the mean.
b. Find the 95% confidence interval for the population mean.
c. Find the 99% confidence interval for the population mean.


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  • CreatedOctober 29, 2015
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