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Before purchasing videoconferencing equipment, a company tested its current internal computer network. The tests measured how rapidly data moved through its network given the current demand on the network. Twenty files ranging in size from 20 to 100 megabytes (MB) were transmitted over the network at various times of day, and the time to send the files (in seconds) recorded in the accompanying data table. The time is given as the number of hours past 8 A.M. on the day of the test. Complete parts (a) through (e). Click the icon to view the data.

Before purchasing videoconferencing equipment, a company tested its current internal computer network. The tests measured how rapidly data moved through its network given the current demand on the network. Twenty files ranging in size from 20 to 100 megabytes (MB) were transmitted over the network at various times of day, and the time to send the files (in seconds) recorded in the accompanying data table. The time is given as the number of hours past 8 A.M. on the day of the test. Complete parts (a) through (e). Click the icon to view the data.

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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A) In the screenshot i provided

B) Does either explanatory variable improve the fit of the model that uses the​ other? Use a test statistic for each. Use α=0.05.

 

Before purchasing videoconferencing equipment, a company tested its current internal computer network. The tests measured how rapidly data moved through its network given the current demand on the network. Twenty files ranging in size from 20 to 100 megabytes (MB) were transmitted over the network at various times of day, and the time to send the files (in seconds) recorded in the accompanying data table. The time is given as the number of hours past 8 A.M. on the day of the test. Complete parts (a) through (e). Click the icon to view the data. (a) Fit the multiple regression of Transfer Time on File Size and Hours past 8. Does the model, taken collectively, explain statistically significant variation in transfer time? Use a = 0.05. because F = with p-value ▼ 0.05. (Round to one decimal place as needed.) Data Table Transfer Time (sec) File Size (MB) Hours past 8 18.4 21 0.00 16.4 24 0.25 15.2 28 0.50 16.6 26 15.5 21.3 17.5 18.3 25.3 20.8 19.4 0.75 1.00 1.25 1.50 1.75 29 31 35 39 52 2.00 2.25 2.50 54 58 21.5 22.5 22.4 68 2.75 3.00 3.25 3.50 64 70 25.7 74 28.1 87 3.75 4.00 4.25 4.50 4.75 33.2 88 28.6 91 24.8 93 31.8 99 Enter your answer in the answer box and then click Check Answer. Print Done
Transcribed Image Text:Before purchasing videoconferencing equipment, a company tested its current internal computer network. The tests measured how rapidly data moved through its network given the current demand on the network. Twenty files ranging in size from 20 to 100 megabytes (MB) were transmitted over the network at various times of day, and the time to send the files (in seconds) recorded in the accompanying data table. The time is given as the number of hours past 8 A.M. on the day of the test. Complete parts (a) through (e). Click the icon to view the data. (a) Fit the multiple regression of Transfer Time on File Size and Hours past 8. Does the model, taken collectively, explain statistically significant variation in transfer time? Use a = 0.05. because F = with p-value ▼ 0.05. (Round to one decimal place as needed.) Data Table Transfer Time (sec) File Size (MB) Hours past 8 18.4 21 0.00 16.4 24 0.25 15.2 28 0.50 16.6 26 15.5 21.3 17.5 18.3 25.3 20.8 19.4 0.75 1.00 1.25 1.50 1.75 29 31 35 39 52 2.00 2.25 2.50 54 58 21.5 22.5 22.4 68 2.75 3.00 3.25 3.50 64 70 25.7 74 28.1 87 3.75 4.00 4.25 4.50 4.75 33.2 88 28.6 91 24.8 93 31.8 99 Enter your answer in the answer box and then click Check Answer. Print Done
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