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?
Added by Natalie J.
Step 1
z = (280 - 272) / 9 z = 8 / 9 z = 0.8889 Show more…
Show all steps
Close
Your feedback will help us improve your experience
Hubert Agamasu and 51 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. Complete pats (a) through (f). What is the probability that a randomly selected pregnancy lasts less than 260 days is approximately
Rashmi S.
The length of human pregnancies follows a Normal distribution with a mean μ= 266 and a standard deviation σ= 16 days. What proportion of pregnancies are less than 238 days?
Joanna Q.
Find the range, mean, variance, and standard deviation of the sample data set. The durations (in days) of pregnancies for a random sample of mothers $\begin{array}{ccccc}295 & 280 & 268 & 278 & 291\end{array}$ $277 \quad 291$ $\begin{array}{rrrrr}279 & 296 & 285 & 269 & 293\end{array}$ $277 \quad 282$ $\begin{array}{rrrr}267 & 281 & 286 & 269\end{array}$ $264 \quad 299$
Descriptive Statistics
Measures of Variation
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