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Hi tutor, thanks for all you do. Please show mathematical work to get the answer. Do not use excel functions. ? Use the given degree

Hi tutor, thanks for all you do.
Please show mathematical work to get the answer. Do not use excel functions.
?
Use the given degree of confidence and sample data to construct a confidence interval for the population mean p. Assume that the population has a normal distribution. 18) Thirty randomly selected students took the calculus final. If the sample mean was 76 and the standard deviation was 11.2, construct a 99% confidence interval for the mean score of all students

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