Testing has been carried out on the length of time ( hours) that a new Brand X smartphone battery will work before the phone switches off because it needs charging. A large number of Brand X phone batteries were tested and t was found to be normally distributed with a mean life of 16.3 hours and a standard deviation of 2.4 hours. All batteries were fully charged before being tested. (a) The graph below represents the normal distribution for Brand X smartphone batteries. Write a number in each box to provide a partial scale for the distribution. 13.9 16.3 18.7 Battery life, (hours) Calculate the percentage of Brand X batteries that could be expected to last less than 15 hours 29.4 from Ned If 834 Brand X batteries were tested, how many could be expected to last less than 15 hours? 1245
Testing has been carried out on the length of time ( hours) that a new Brand X smartphone battery will work before the phone switches off because it needs charging. A large number of Brand X phone batteries were tested and t was found to be normally distributed with a mean life of 16.3 hours and a standard deviation of 2.4 hours. All batteries were fully charged before being tested. (a) The graph below represents the normal distribution for Brand X smartphone batteries. Write a number in each box to provide a partial scale for the distribution. 13.9 16.3 18.7 Battery life, (hours) Calculate the percentage of Brand X batteries that could be expected to last less than 15 hours 29.4 from Ned If 834 Brand X batteries were tested, how many could be expected to last less than 15 hours? 1245
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:Testing has been carried out on the length of time ( hours) that a new Brand X smartphone battery
will work before the phone switches off because it needs charging. A large number of Brand X phone
batteries were tested and t was found to be normally distributed with a mean life of 16.3 hours and a
standard deviation of 2.4 hours. All batteries were fully charged before being tested.
(a) The graph below represents the normal distribution for Brand X smartphone batteries.
Write a number in each box to provide a partial scale for the distribution.
13.9 16.3
18.7
Battery life, t (hours)
Calculate the percentage of Brand X batteries that could be expected to last less than 15 hours.
29.4
47 from Neel
If 834 Brand X batteries were tested, how many could be expected to last less than 15 hours?
245
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Step 1: Define the data to obtain the missing values for the given distribution.
VIEWStep 2: Obtain the missing values for the given distribution.
VIEWStep 3: Obtain the percentage of Brand X batteries that could be expected to last less than 15 hours.
VIEWStep 4: Determine the number of batteries tested that could be expected to last less than 15 hours.
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