In a sample of 23 hip surgeries, the mean surgery time was found to be 136.9 minutes, with a standard deviation of 22.6 minutes. Compute a 95% confidence interval for the mean length of all hip surgeries.
Added by Jose P.
Step 1
96\), \(s = 22.6\), and \(n = 23\). Show more…
Show all steps
Close
Your feedback will help us improve your experience
Sri K and 57 other Intro Stats / AP Statistics educators are ready to help you.
Ask a new question
Labs
Want to see this concept in action?
Explore this concept interactively to see how it behaves as you change inputs.
Key Concepts
Recommended Videos
In a random sample of 24 hip surgeries of a certain type, the mean surgery time was 136.9 minutes with a sample standard deviation of 22.6 minutes. Which of the following is a 90% confidence interval for the population mean surgery time?
Chris M.
Hip surgery: In a sample of 129 hip surgeries of a certain type, the average surgery time was 138.1 minutes, with a standard deviation of 23.3 minutes. Construct a 99% confidence interval for the mean surgery time for this procedure. Round the answers to one decimal place.
Sanchit J.
Assume the sample is from a normally distributed population and construct the indicated confidence intervals for $(a)$ the population variance $\sigma^{2}$ and $(b)$ the population standard deviation $\sigma .$ Interpret the results. The waiting times (in minutes) of a random sample of 22 people at a bank have a sample standard deviation of 3.6 minutes. Use a $98 \%$ level of confidence.
Confidence Intervals
Confidence Intervals for Variance and Standard Deviation
Recommended Textbooks
Elementary Statistics a Step by Step Approach
The Practice of Statistics for AP
Introductory Statistics
Transcript
18,000,000+
Students on Numerade
Trusted by students at 8,000+ universities
Watch the video solution with this free unlock.
EMAIL
PASSWORD