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Name: A STAT130 student who uses a laptop issued by ICS, believes that the a
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Description: A STAT130 student who uses a laptop issued by ICS, believes that the average speed at which it downloads lecture slides is slower than the required speed of 25 kilobits per second (Kb/s). He would like to conduct a hypothesis test, using a 1% level o

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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A STAT130 student who uses a laptop issued by ICS, believes that the average speed at which it downloads lecture slides is slower than the required speed of 25 kilobits per second (Kb/s). He would like to conduct a hypothesis test, using a 1% level of significance, to see if his belief could be correct. This student collects a random sample of 15 ICS issued laptops and checks their download speed. The sample average speed obtained is 24 Kb/s with a standard deviation of 3 Kb/s. When will the null hypothesis be rejected? When the test statistic is less than -2.624 When the test statistic is less than -2.326 or greater than 2.326 When the test statistic is less than -2.624 or greater than 2.624 When the test statistic is greater than 2.624. When the test statistic is less -2.326 The student constructs the following 95% confidence interval for the average speed at which the ICS issued laptops download lecture slides: ( 22.3; 25.7 ) Thus, the student can say with 95% confidence, that approximately 22 to 26 ICS Issued laptops download lecture slides at the required average speed, the average speed at which the ICS issued laptops download lecture slides is between 22.3 Kb/s and 25,7 Kb/s. the speed at which all ICS Issued laptops download lecture slides is between 22.3 Kb/s and 25,7 Kb/s. the average speed at which the ICS issued laptops download lecture slides is between 22.3 Kb/s and 25.7 Kb/s 95% of the time. only 5% of the ICS issued laptops download lecture slides at speeds less than 22.3 Kb/s or more than 25.7 Kb/s. The student decides to conduct a hypothesis test to see if the standard deviation of the ICS issued laptops could be the same as that of the sample. Which one of the following pairs of hypotheses can the student use?

OH, : 0° = 3
OH, : o =
H, : 0 + 3
2
vs
H, : o + 9
2
OH, : o = 9
vs
H, : 0 + 3
%3D
OH, : o = 3
H, : o > 3
VS
OH, : 0 = 9
H, : o > 9
VS

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