In the library of a university, the mean duration (in days) of the borrowing period of the books is 12. A simple random sample of 26 books is analyzed, and the values 40 and 2.6 are obtained for the sample mean and the sample standard deviation, respectively. Construct a 95% confidence interval for the mean duration of the borrowings. Solve the following questions. a. tą (negative value only): b. Lower Cl: c. Upper Cl: d. Within the boundary or Not within the boundary:

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In the library of a university, the mean duration (in days) of the borrowing period of the books is
12. A simple random sample of 26 books is analyzed, and the values 40 and 2.6 are obtained for
the sample mean and the sample standard deviation, respectively. Construct a 95% confidence
interval for the mean duration of the borrowings. Solve the following questions.
a. tę (negative value only):
b. Lower Cl:
c. Upper Cl:
d. Within the boundary or Not within the boundary:
Transcribed Image Text:In the library of a university, the mean duration (in days) of the borrowing period of the books is 12. A simple random sample of 26 books is analyzed, and the values 40 and 2.6 are obtained for the sample mean and the sample standard deviation, respectively. Construct a 95% confidence interval for the mean duration of the borrowings. Solve the following questions. a. tę (negative value only): b. Lower Cl: c. Upper Cl: d. Within the boundary or Not within the boundary:
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