Question

Hip surgery: In a sample of 122 hip surgeries of a certain type, the average surgery time was 136.7 minutes with a standard deviation of 22.5 minutes. Part: 0/2 Part 1 of 2 (a) Construct an 80% confidence interval for the mean surgery time for this procedure. Round the answers to at least one decimal place. An 80% confidence interval for the mean surgery time for this procedure is Part: 1/2 Part 2 of 2 (b) If a 99.9% confidence interval were constructed with these data, would it be wider or narrower than the interval constructed in part (a)? Explain. The new confidence interval would be (Choose one) than the interval constructed in part (a).

          Hip surgery: In a sample of 122 hip surgeries of a certain type, the average surgery time was 136.7 minutes with a standard deviation of 22.5 minutes.
Part: 0/2
Part 1 of 2
(a) Construct an 80% confidence interval for the mean surgery time for this procedure. Round the answers to at least one decimal place.
An 80% confidence interval for the mean surgery time for this procedure is
Part: 1/2
Part 2 of 2
(b) If a 99.9% confidence interval were constructed with these data, would it be wider or narrower than the interval constructed in part (a)? Explain.
The new confidence interval would be (Choose one) than the interval constructed in part (a).

Hip surgery: In a sample of 122 hip surgeries of a certain type, the average surgery time was 136.7 minutes with a standard deviation of 22.5 minutes.
Part: 0/2
Part 1 of 2
(a) Construct an 80% confidence interval for the mean surgery time for this procedure. Round the answers to at least one decimal place.
An 80% confidence interval for the mean surgery time for this procedure is
Part: 1/2
Part 2 of 2
(b) If a 99.9% confidence interval were constructed with these data, would it be wider or narrower than the interval constructed in part (a)? Explain.
The new confidence interval would be (Choose one) than the interval constructed in part (a).

Added by Christopher L.

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