[S9] A cell phone manufacturer claims that the batteries in its latest model provide 20 hour. continuous use. In order to verify this claim, and independent testing firm checks the battery life 100 phones. They find that the batteries in these 100 phones last an average of 19 hours with a standard deviation of 5 hours. Conduct an appropriate hypothesis test to check whether the results from this sample provide sufficient evidence that the true mean battery life is significantly less than 20 hours. a) Is this a question about the sample mean or the sample proportion? Explain how you know. b) What is the most appropriate test, a two-tailed test, a right-tailed test, or a left-tailed test? Explain how you know. State the null and alternative hypotheses. Make sure to use proper notation. c) Calculate the test statistic. Make sure to show all your computations. d) Determine the P-value. Make sure to explain how you obtained the value. e) f) State the decision about the null hypothesis as well as the conclusion from your hypothesis test in the context of the problem. [MP2 also]
[S9] A cell phone manufacturer claims that the batteries in its latest model provide 20 hour. continuous use. In order to verify this claim, and independent testing firm checks the battery life 100 phones. They find that the batteries in these 100 phones last an average of 19 hours with a standard deviation of 5 hours. Conduct an appropriate hypothesis test to check whether the results from this sample provide sufficient evidence that the true mean battery life is significantly less than 20 hours. a) Is this a question about the sample mean or the sample proportion? Explain how you know. b) What is the most appropriate test, a two-tailed test, a right-tailed test, or a left-tailed test? Explain how you know. State the null and alternative hypotheses. Make sure to use proper notation. c) Calculate the test statistic. Make sure to show all your computations. d) Determine the P-value. Make sure to explain how you obtained the value. e) f) State the decision about the null hypothesis as well as the conclusion from your hypothesis test in the context of the problem. [MP2 also]
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
Related questions
Question
![[S9] A cell phone manufacturer claims that the batteries in its latest model provide 20 hour.
continuous use. In order to verify this claim, and independent testing firm checks the battery life
100 phones. They find that the batteries in these 100 phones last an average of 19 hours with a
standard deviation of 5 hours.
Conduct an appropriate hypothesis test to check whether the results from this sample provide
sufficient evidence that the true mean battery life is significantly less than 20 hours.
a)
Is this a question about the sample mean or the sample proportion? Explain how you know.
b)
What is the most appropriate test, a two-tailed test, a right-tailed test, or a left-tailed
test? Explain how you know.
State the null and alternative hypotheses. Make sure to use proper notation.
c)
Calculate the test statistic. Make sure to show all your computations.
d)
Determine the P-value. Make sure to explain how you obtained the value.
e)
f)
State the decision about the null hypothesis as well as the conclusion from your hypothesis test
in the context of the problem. [MP2 also]](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F2487e6aa-8b43-4d13-bcc5-bed86de74bf3%2Fce9c3ab0-f9f6-4916-84e5-e440ec60193f%2F7l29wcs.jpeg&w=3840&q=75)
Transcribed Image Text:[S9] A cell phone manufacturer claims that the batteries in its latest model provide 20 hour.
continuous use. In order to verify this claim, and independent testing firm checks the battery life
100 phones. They find that the batteries in these 100 phones last an average of 19 hours with a
standard deviation of 5 hours.
Conduct an appropriate hypothesis test to check whether the results from this sample provide
sufficient evidence that the true mean battery life is significantly less than 20 hours.
a)
Is this a question about the sample mean or the sample proportion? Explain how you know.
b)
What is the most appropriate test, a two-tailed test, a right-tailed test, or a left-tailed
test? Explain how you know.
State the null and alternative hypotheses. Make sure to use proper notation.
c)
Calculate the test statistic. Make sure to show all your computations.
d)
Determine the P-value. Make sure to explain how you obtained the value.
e)
f)
State the decision about the null hypothesis as well as the conclusion from your hypothesis test
in the context of the problem. [MP2 also]
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