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A random sample of 31 patients in a doctor’s office found that waiting times had a...

A random sample of 31 patients in a doctor’s office found that waiting times had a mean of 13 minutes with a standard deviation of 4.1 minutes. Estimate the true population variance with 90% confidence.

Select one:

a. (13.733 , 26.064)

b. (3.539 , 5.222)

c. (3.706 , 5.105)

d. (11.750 , 14.250)

e. (12.527 , 27.270)

f. (3.428 , 3.775)

Math   Statistics-And-Probability   
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Answer #1

Note- The values of lower bond is wrong in the option E

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