Steve believes that his wife's cell phone battery does not last as long as his cell phone battery. On ten different occasions, he measured the length of time his cell phone battery lasted and calculated that the mean was 24.1 hours with a standard deviation of 10.3 hours. He measured the length of time his wife's cell phone battery lasted on eight different occasions and calculated a mean of 16.8 hours with a standard deviation of 7.8 hours. Assume that the population variances are the same. Let Population 1 be the battery life of Steve's cell phone and Population 2 be the battery life of his wife's cell phone. Step 2 of 2: Interpret the confidence interval obtained in Step 1. Answer 1 Point E Tables E Keypad Keyboard Shortcuts O Since the confidence interval contains zero, the data do not provide evidence that the population means are unequal at a 99% confidence level. Since the confidence interval does not contain zero, the data do not provide evidence that the population means are unequal at a 99 % confidence level. We are 99% confident that the mean battery life of Steve's cell phone is between 5.6 hours and 20.2 hours shorter than the mean battery life of his wife's cell phone. > We are 99% confident that the mean battery life of Steve's cell phone is between 5.6 hours and 20.2 hours longer than the mean battery life of his wife's cell phone. Prev Next
Steve believes that his wife's cell phone battery does not last as long as his cell phone battery. On ten different occasions, he measured the length of time his cell phone battery lasted and calculated that the mean was 24.1 hours with a standard deviation of 10.3 hours. He measured the length of time his wife's cell phone battery lasted on eight different occasions and calculated a mean of 16.8 hours with a standard deviation of 7.8 hours. Assume that the population variances are the same. Let Population 1 be the battery life of Steve's cell phone and Population 2 be the battery life of his wife's cell phone. Step 2 of 2: Interpret the confidence interval obtained in Step 1. Answer 1 Point E Tables E Keypad Keyboard Shortcuts O Since the confidence interval contains zero, the data do not provide evidence that the population means are unequal at a 99% confidence level. Since the confidence interval does not contain zero, the data do not provide evidence that the population means are unequal at a 99 % confidence level. We are 99% confident that the mean battery life of Steve's cell phone is between 5.6 hours and 20.2 hours shorter than the mean battery life of his wife's cell phone. > We are 99% confident that the mean battery life of Steve's cell phone is between 5.6 hours and 20.2 hours longer than the mean battery life of his wife's cell phone. Prev Next
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:Steve believes that his wife's cell phone battery does not last as long as his cell phone battery. On ten different occasions, he measured the length of
time his cell phone battery lasted and calculated that the mean was 24.1 hours with a standard deviation of 10.3 hours. He measured the length of
time his wife's cell phone battery lasted on eight different occasions and calculated a mean of 16.8 hours with a standard deviation of 7.8 hours.
Assume that the population variances are the same. Let Population 1 be the battery life of Steve's cell phone and Population 2 be the battery life of
his wife's cell phone.
Step 2 of 2: Interpret the confidence interval obtained in Step 1.
Answer
1 Point
E Tables
E Keypad
Keyboard Shortcuts
O Since the confidence interval contains zero, the data do not provide evidence that the population means are unequal at a 99% confidence level.
Since the confidence interval does not contain zero, the data do not provide evidence that the population means are unequal at a 99 % confidence
level.
We are 99% confident that the mean battery life of Steve's cell phone is between 5.6 hours and 20.2 hours shorter than the mean battery life of his
wife's cell phone.
>
We are 99% confident that the mean battery life of Steve's cell phone is between 5.6 hours and 20.2 hours longer than the mean battery life of his
wife's cell phone.
Prev
Next
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