Answered: One variable that Google uses to rank…

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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Question

One variable that Google uses to rank pages on the internet is page speed, the time it takes for a web page to load into your browser. A source for women's clothing is redesigning their page to improve the images that show its products and to reduce its load time. The new page is clearly faster, but initial tests indicate there is more variation in the time to load. A sample of 16 different load times showed that the standard deviation of the load time was 22 hundredths of a second for the new page and 12 hundredths of a second for the current page. At the 0.05 significance level, can we conclude that there is more variation in the load time of the new page? Required: a. What is the decision rule? H0:σ2η≤σ20 ; H1:σ2η>σ20 (Round your answer to 2 decimal places.) b. Calculate the test statistic. (Round your answer to 2 decimal places.) c. What is the decision regarding the null hypothesis? d. Is there more variation in the load time of the new page? multiple choice Yes No Students (minutes) Sequence Allen Carla Henry A 22.4 20.8 21.5 B 17.0 19.4 20.7 C 19.2 20.2 21.2 D 20.3 18.6 20.4 Click here for the Excel Data File Required: a-1. Identify the right option for Treatments (Students). Null hypothesis: H0: μA = μC = μH H0: μA ≠ μC ≠ μH multiple choice 1 a b Alternate hypothesis: multiple choice 2 All means are the same. Not all means are the same. a-2. Identify the right option for Blocks (Sequence). Null hypothesis: H0: μA ≠ μB ≠ μC ≠ μD H0: μA = μB = μC = μD multiple choice 3 a b Alternate hypothesis: multiple choice 4 Not all means are the same. All means are the same. b. What are the test statistics? (Round your answers to 4 decimal places.) c. What are the p-values? (Round your answers to 4 decimal places.) d. Using a 0.05 significance level, what is your decision regarding the null hypotheses? e-1. Interpret the result for treatments. e-2. Interpret the result for blocks.

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