The lifetime of an opened carton of milk, when refrigerated, has a normal distribution with mean 120 hours and standard deviation 64 hours. Find the probability that a randomly selected carton has an expiration of less than 115 hours.

The lifetime of an opened carton of milk, when refrigerated, has a normal distribution with mean 120 hours and standard deviation 64 hours. Find the probability that a randomly selected carton has an expiration of less than 115 hours.

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter10: Statistics

Section10.4: Distributions Of Data

Problem 19PFA

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20. The lifetime of an opened carton of milk, when refrigerated, has a normal distribution with mean 120 hours and standard deviation 64 hours. Find the probability that a randomly selected carton has an expiration of less than 115 hours.

Features Features Normal distribution is characterized by two parameters, mean (µ) and standard deviation (σ). When graphed, the mean represents the center of the bell curve and the graph is perfectly symmetric about the center. The mean, median, and mode are all equal for a normal distribution. The standard deviation measures the data's spread from the center. The higher the standard deviation, the more the data is spread out and the flatter the bell curve looks. Variance is another commonly used measure of the spread of the distribution and is equal to the square of the standard deviation.

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