The time until recharge for a battery in a laptop computer under common conditions is normally distributed with mean of 260 minutes and a standard deviation of 50 minutes. a) What is the probability that a battery lasts more than four hours? b) What are the quartiles (the 25% and 75% values) of battery life? (Round the answer to 3 decimal places.) 25% value = minutes (Round the answer to the nearest integer.) 75% value = minutes (Round the answer to the nearest integer.) c) What value of life in minutes is exceeded with 95% probability? (Round the answer to the nearest integer.)

The time until recharge for a battery in a laptop computer under common conditions is normally distributed with mean of 260 minutes and a standard deviation of 50 minutes. a) What is the probability that a battery lasts more than four hours? b) What are the quartiles (the 25% and 75% values) of battery life? (Round the answer to 3 decimal places.) 25% value = minutes (Round the answer to the nearest integer.) 75% value = minutes (Round the answer to the nearest integer.) c) What value of life in minutes is exceeded with 95% probability? (Round the answer to the nearest integer.)

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.

Question

The time until recharge for a battery in a laptop computer under common conditions is normally distributed with mean of 260 minutes and a standard deviation of 50 minutes.
a) What is the probability that a battery lasts more than four hours?
b) What are the quartiles (the 25% and 75% values) of battery life?
(Round the answer to 3 decimal places.)
25% value =
minutes (Round the answer to the nearest integer.)
75% value =
minutes (Round the answer to the nearest integer.)
c) What value of life in minutes is exceeded with 95% probability?
(Round the answer to the nearest integer.)

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