A manufacturer knows that their items have a normally distributed lifespan, with a mean of 9.9 years, and standard deviation of 3 years. The 9% of items with the shortest lifespan will last less than how many years? Give your answer to one decimal place. Submit Question
A manufacturer knows that their items have a normally distributed lifespan, with a mean of 9.9 years, and standard deviation of 3 years. The 9% of items with the shortest lifespan will last less than how many years? Give your answer to one decimal place. Submit Question
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.3: Measures Of Spread
Problem 26PFA
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Normal distribution is used for calculating the probability of a continuous variable when the data is more or less symmetric. So, a normal distribution curve is bell shaped, in which the highest point of the curve indicates the value of the highest probability, and the values of probability decrease on both sides of the curve and eventually become zero.
The formula to compute the z-score is:
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