The lengths of a particular animal's pregnancies are approximately normally distributed, with mean μ = 277 days and standard deviation o = 20 days. (a) What proportion of pregnancies lasts more than 302 days? (b) What proportion of pregnancies lasts between 252 and 287 days? (c) What is the probability that a randomly selected pregnancy lasts no more than 242 days?

Calculus For The Life Sciences
2nd Edition
ISBN:9780321964038
Author:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Publisher:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Chapter13: Probability And Calculus
Section13.CR: Chapter 13 Review
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The lengths of a particular animal's pregnancies are approximately normally distributed, with mean µ = 277 days and
standard deviation o = 20 days.
(a) What proportion of pregnancies lasts more than 302 days?
(b) What proportion of pregnancies lasts between 252 and 287 days?
(c) What is the probability that a randomly selected pregnancy lasts no more than 242 days?
Transcribed Image Text:The lengths of a particular animal's pregnancies are approximately normally distributed, with mean µ = 277 days and standard deviation o = 20 days. (a) What proportion of pregnancies lasts more than 302 days? (b) What proportion of pregnancies lasts between 252 and 287 days? (c) What is the probability that a randomly selected pregnancy lasts no more than 242 days?
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ISBN:
9780321964038
Author:
GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Publisher:
Pearson Addison Wesley,