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In the past, the mean runing ime for a certain type of flshight attery has been 7.9 hours. The manufecturer has introduced a change in the production method which he hopes has increased the mean running time. The mean running time for a random sample of 40 light bulbs was 8.1 hours. Do the data provide sufient evidence to condude that the mean running time of al light bulbs, u, has increased from the previous mean of 7.9 hours? Perform the appropriate hypothesis test using a signficance level of 0.05. Assume that o = 0.5 hours. Ho : µ= 8.1 hours Hị : µ > 8.1 hours a = 0.05 OZ=2.62 P-value = 0.0044 Reject H, . At the 5% significance level, the data provide sufficient evidence to conclude that the mean running time of all light bulbs, µ, has increased from the previous mean of 8.1 hours. Ho : u = 7.9 hours H1: u> 7.9 hours a = 0.0S z- 2.62 P-value - 0.0044 Reject Ħ, . At the 5% significance level, the data provide sufficient evidence to conclude that the mean running time of all light bulbs, µ, has increased from the previous mean of 7.9 hours. Ho : µ=7.9 hours Hị : µ> 7.9 hours a= 0.05 Oz=2.53 P-value - 0.0057 Reject Ħ. . At the 5% significance level, the data provide sufficient evidence to conclude that the mean running time of all light bulbs, µ, has increased from the previous mean of 7.9 hours. Ho : u = 8.1 hours H : u> 8.1 hours a - 0.05 = 2.53 P-value - 0.0057 Reject Ho - At the 5% significance level, the data provide sufficient evidence to conclude that the mean running time of all light bulbs, , has increased from the previou s mean of 8.1 hours.

In the past, the mean runing ime for a certain type of flshight attery has been 7.9 hours. The manufecturer has introduced a change in the production method which he hopes has increased the mean running time. The mean running time for a random sample of 40 light bulbs was 8.1 hours. Do the data provide sufient evidence to condude that the mean running time of al light bulbs, u, has increased from the previous mean of 7.9 hours? Perform the appropriate hypothesis test using a signficance level of 0.05. Assume that o = 0.5 hours. Ho : µ= 8.1 hours Hị : µ > 8.1 hours a = 0.05 OZ=2.62 P-value = 0.0044 Reject H, . At the 5% significance level, the data provide sufficient evidence to conclude that the mean running time of all light bulbs, µ, has increased from the previous mean of 8.1 hours. Ho : u = 7.9 hours H1: u> 7.9 hours a = 0.0S z- 2.62 P-value - 0.0044 Reject Ħ, . At the 5% significance level, the data provide sufficient evidence to conclude that the mean running time of all light bulbs, µ, has increased from the previous mean of 7.9 hours. Ho : µ=7.9 hours Hị : µ> 7.9 hours a= 0.05 Oz=2.53 P-value - 0.0057 Reject Ħ. . At the 5% significance level, the data provide sufficient evidence to conclude that the mean running time of all light bulbs, µ, has increased from the previous mean of 7.9 hours. Ho : u = 8.1 hours H : u> 8.1 hours a - 0.05 = 2.53 P-value - 0.0057 Reject Ho - At the 5% significance level, the data provide sufficient evidence to conclude that the mean running time of all light bulbs, , has increased from the previou s mean of 8.1 hours.

MATLAB: An Introduction with Applications
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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In the past, thẻ mean running time for a certain type of flashlight battery has been 7.9 hours. The manufacturer has introduced a change in the production method which he hopes has increased the mean running time. The mean running time for a random sample of 40 light bulbs was 8.1 hours. Do the data provide suffient evidence to conclude that the mean runing time of al light bulbs, 4, has increased from the previous mean of 7.9 hours? Perform the appropriate hypothesis test using a signficance level of 0.05. Assume that o = 0.5 hours. Ho : µ= 8.1 hours H,: u> 8.1 hours a = 0.05 z = 2.62 P-value - 0.0044 Reject H, . At the 5% significance level, the data provide sufficient evidence to conclude that the mean running time of all light bulbs, µu, has increased from the previous mean of 8.1 hours. Ho : H= 7.9 hours H1: H> 7.9 hours a = 0.05 z - 2.62 P-value - 0.0044 Reject Ħ, . At the 5% significance level, the data provide sufficient evidence to conclude that the mean running time of all light bulbs, µ, has increased from the previous mean of 7.9 hours. | Ho : µ=7.9 hours Hị : µ>7.9 hours a = 0.05 z= 2.53 P-value = 0.0057 Reject H, . At the 5% significance level, the data provide sufficient evidence to conclude that the mean running time of all light bulbs, µ, has increased from the previous mean of 7.9 hoưrs. Ho : u = S.1 hours H : u> 8.1 hours a - 0.05 z - 2.53 P-value - 0.0057 Reject Ho - At the 5% significance level, the data provide sufficient evidence to conclude that the mean running time of all light bulbs, p, has increased from the previou s mean of 8.1 hours.
Transcribed Image Text:In the past, thẻ mean running time for a certain type of flashlight battery has been 7.9 hours. The manufacturer has introduced a change in the production method which he hopes has increased the mean running time. The mean running time for a random sample of 40 light bulbs was 8.1 hours. Do the data provide suffient evidence to conclude that the mean runing time of al light bulbs, 4, has increased from the previous mean of 7.9 hours? Perform the appropriate hypothesis test using a signficance level of 0.05. Assume that o = 0.5 hours. Ho : µ= 8.1 hours H,: u> 8.1 hours a = 0.05 z = 2.62 P-value - 0.0044 Reject H, . At the 5% significance level, the data provide sufficient evidence to conclude that the mean running time of all light bulbs, µu, has increased from the previous mean of 8.1 hours. Ho : H= 7.9 hours H1: H> 7.9 hours a = 0.05 z - 2.62 P-value - 0.0044 Reject Ħ, . At the 5% significance level, the data provide sufficient evidence to conclude that the mean running time of all light bulbs, µ, has increased from the previous mean of 7.9 hours. | Ho : µ=7.9 hours Hị : µ>7.9 hours a = 0.05 z= 2.53 P-value = 0.0057 Reject H, . At the 5% significance level, the data provide sufficient evidence to conclude that the mean running time of all light bulbs, µ, has increased from the previous mean of 7.9 hoưrs. Ho : u = S.1 hours H : u> 8.1 hours a - 0.05 z - 2.53 P-value - 0.0057 Reject Ho - At the 5% significance level, the data provide sufficient evidence to conclude that the mean running time of all light bulbs, p, has increased from the previou s mean of 8.1 hours.
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