The president of a large university wishes to estimate the average of the students presently enrolled. From past studies, the standard deviation is known to be 2.2 years. A sample of 60 students is selected, and the mean is found to be 23.5 years. Find 99% confidence interval of the population mean. (use the below link to get the standard normal-table) https://drive.google.com/file/d/1rLJzsws5fYwvtnN9mPBrB9PQn7VOYJfB/view? usp=sharing a. 22.6 < µ < 23.8 b. 22.767 < u < 24.233 c. 20.6 < µ < 24.4 d. 21.5 < µ < 24.2

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The president of a large university wishes to estimate the average of the students
presently enrolled. From past studies, the standard deviation is known to be 2.2 years. A
sample of 60 students is selected, and the mean is found to be 23.5 years. Find 99%
confidence interval of the population mean.
(use the below link to get the standard normal-table)
https://drive.google.com/file/d/1rLJzsws5fYwvtnN9mPBrB9PQn7VOYJfB/view?
usp=sharing
a. 22.6 < µ < 23.8
b. 22.767 < u < 24.233
c. 20.6 < µ < 24.4
d. 21.5 < µ < 24.2
Transcribed Image Text:The president of a large university wishes to estimate the average of the students presently enrolled. From past studies, the standard deviation is known to be 2.2 years. A sample of 60 students is selected, and the mean is found to be 23.5 years. Find 99% confidence interval of the population mean. (use the below link to get the standard normal-table) https://drive.google.com/file/d/1rLJzsws5fYwvtnN9mPBrB9PQn7VOYJfB/view? usp=sharing a. 22.6 < µ < 23.8 b. 22.767 < u < 24.233 c. 20.6 < µ < 24.4 d. 21.5 < µ < 24.2
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