18 - The lifetime of the phones produced in factory A is 2900 days. The phones produced in factory B have a lifespan of 2600 days. A sample of 50 telephones was taken from factories A and B. Since the standard error of the difference between the sample averages of the phone lifetimes is 25.49, what is the probability that the mean of the sample from factory A will be more than 325 days from the mean of the sample from factory B? A) 0.1635
18 - The lifetime of the phones produced in factory A is 2900 days. The phones produced in factory B have a lifespan of 2600 days. A sample of 50 telephones was taken from factories A and B. Since the standard error of the difference between the sample averages of the phone lifetimes is 25.49, what is the probability that the mean of the sample from factory A will be more than 325 days from the mean of the sample from factory B? A) 0.1635
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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18 - The lifetime of the phones produced in factory A is 2900 days. The phones produced in factory B have a lifespan of 2600 days. A sample of 50 telephones was taken from factories A and B. Since the standard error of the difference between the sample averages of the phone lifetimes is 25.49, what is the probability that the mean of the sample from factory A will be more than 325 days from the mean of the sample from factory B?
A) 0.1635
B) 0.483
C) 0.237
D) 0.331
E) 0.95
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