The lifetime of a lightbulb in a certain application is normally distributed with mean μ = 1,500 hours and standard deviation σ = 200 hours. 1. What is the probability that a lightbulb will last more than 1800 hours? (Round the final answer to four decimal places.) 2. Find the 10th percentile of the lifetimes. (Round the final answer to the nearest integer.) 3. A particular lightbulb lasts 1645 hours. What percentile is its lifetime on? (Round the final answer to the nearest whole number.)
The lifetime of a lightbulb in a certain application is normally distributed with mean μ = 1,500 hours and standard deviation σ = 200 hours. 1. What is the probability that a lightbulb will last more than 1800 hours? (Round the final answer to four decimal places.) 2. Find the 10th percentile of the lifetimes. (Round the final answer to the nearest integer.) 3. A particular lightbulb lasts 1645 hours. What percentile is its lifetime on? (Round the final answer to the nearest whole number.)
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
Section13.3: Special Probability Density Functions
Problem 40E: Pygmy Height The average height of a member of a certain tribe of pygmies is 3.2ft, with a standard...
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Question
The lifetime of a lightbulb in a certain application is
1. What is the
2. Find the 10th percentile of the lifetimes. (Round the final answer to the nearest integer.)
3. A particular lightbulb lasts 1645 hours. What percentile is its lifetime on? (Round the final answer to the nearest whole number.)
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