Assume that the sleep time per night among college students has a distribution with mean 6.52 hours and standard deviation 0.84 hours. For a random sample of 100 college students, find the probability that the average nightly sleep time exceeds six and a half hours. Is your answer exact or approximate?
Added by Shawn A.
Close
Step 1
We are given the population mean (μ) = 6.52 hours and the population standard deviation (σ) = 0.84 hours. Show more…
Show all steps
Your feedback will help us improve your experience
Prabhakar Kumar and 86 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
The time a student sleeps per night has a distribution with mean 6.3 hours and a standard deviation of 0.4 hours. Find the probability that average sleeping time for a randomly selected sample of 34 students is more than 6.5 hours per night.
Jeremy G.
A study being done on college students found that the mean amount of sleep that a college student receives per night is 6.7 hours with standard deviation of 1.5 hours. Suppose random sample of 40 college students is taken. Find the probability that the mean amount of sleep will be less than 7.1 hours. Round your standard deviation to two decimal places. 0.87 0.95 0.98 0.83
Joanna Q.
5.28 - Total Sleep Time of College Students In example, 5.4, the total sleep time per night among college students was approximately normally distributed with a mean = 6.78 hours and standard deviation = 1.24 hours. You plan to take an SRS of size n=120 and compute the average total sleep time. a. What is the standard deviation for the average time? b. Use the 95 part of the 68-95-99.7 rule to describe the variability of this sample mean. c. What is the probability that your average will be below 6.9 hours?
David N.
Recommended Textbooks
Elementary Statistics a Step by Step Approach
The Practice of Statistics for AP
Introductory Statistics
Transcript
Watch the video solution with this free unlock.
EMAIL
PASSWORD