The average lifetime of a light bulb is 3000 hours with a standard deviation of 696 hours. A simple random sample of 36 bulbs is taken. (a) What are the expected value, standard deviation, and sampling distribution of x? (b) What is the probability that the average life time in the sample will be between 2670.56 and 2809.76 hours? (c) What is the probability that the average life time in the sample will be equal to or greater than 3219.24 hours? (d) What is the probability that the average life time in the sample will be equal to or less than

The average lifetime of a light bulb is 3000 hours with a standard deviation of 696 hours. A simple random sample of 36 bulbs is taken. (a) What are the expected value, standard deviation, and sampling distribution of x? (b) What is the probability that the average life time in the sample will be between 2670.56 and 2809.76 hours? (c) What is the probability that the average life time in the sample will be equal to or greater than 3219.24 hours? (d) What is the probability that the average life time in the sample will be equal to or less than

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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