The length of human pregnancies is approximately normal with mean mu equals 266 days and standard deviation sigma equals 16 days. What is the probability that a random sample of 67 pregnancies has a mean gestation period of 261 days or less? The probability that the mean of a random sample of 67 pregnancies is less than 261 days is approximately
Added by Tatiana C.
Step 1
We are given that the length of human pregnancies follows a normal distribution with a mean (μ) of 266 days and a standard deviation (σ) of 16 days. We need to find the probability that the mean gestation period of a random sample of 67 pregnancies is 261 days or Show more…
Show all steps
Close
Your feedback will help us improve your experience
Anna D. and 58 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 length of human pregnancies is approximately normal with mean μ=266 days and standard deviation σ=16 days. What is the probability that a random sample of 49 pregnancies has a mean gestation period of 262 days or less? (Round to four decimal places as needed.)
Prabhakar K.
The lengths of human pregnancies from conception to birth varies according to a distribution that is approximately Normal with mean 266 days and standard deviation 16 days. A study enrolls a random sample of 25 pregnant women. Assuming all appropriate conditions are met, what is the probability that the average pregnancy length of the women in the study is more than 268 days?
Kari H.
A study reported that the length of pregnancy from conception to birth is approximately normally distributed with the mean μ = 272 days and standard deviation σ = 9 days. What proportion of pregnancies last longer than 280 days?
Hubert A.
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