A random sample of 36 cars showed a mean speed on highway 804 at 5PM of 57 miles per hour with a standard deviation of 7.8 miles per hour. Establish a 98% confidence interval for the mean speed on highway 804 at 5PM. Assume the population standard deviation is NOT KNOWN.
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A random sample of 36 cars showed a mean speed on highway 804 at 5PM of 57 miles per hour with a standard deviation of 7.8 miles per hour. Establish a 98% confidence interval for the mean speed on highway 804 at 5PM. Assume the population standard deviation is NOT KNOWN.
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