Question

Based on interviews with 87 SARS​ patients, researchers found that the mean incubation period was 5.5...

Based on interviews with 87

SARS​ patients, researchers found that the mean incubation period was 5.5

​days, with a standard deviation of 15.6

days. Based on this​ information, construct a​ 95% confidence interval for the mean incubation period of the SARS virus. Interpret the interval.

The lower bound is

nothing

days.​ (Round to two decimal places as​ needed.) The upper bound is

nothing

days. ​(Round to two decimal places as​ needed.)

Interpret the interval. Choose the correct answer below.

A.

There is​ 95% confidence that the mean incubation period lies between the lower and upper bounds of the interval.

B.

There is a​ 95% probability that the mean incubation period lies between the lower and upper bounds of the interval.

C.

There is​ 95% confidence that the mean incubation period is less than the lower bound of the interval.

D.

There is​ 95% confidence that the mean incubation period is greater than the upper bound of the interval.

Homework Answers

Answer #1

Refer t-table or use excel function "=T.INV.2T(0.05,86)" to find the value of t.

There is​ 95% confidence that the mean incubation period lies between the lower and upper bounds of the interval.

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