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11.40 In the preliminary studies of a new drug, a pharmaceutical firm needs to obtain infor- mation on the relationship between the dose level and potency of the drug. In order to obtain this information, a total of 18 test tubes are inoculated with a virus culture and incubated for an appropriate period of time. Three test tubes are randomly assigned to each of six different dose levels. The 18 test tubes are then injected with the randomly assigned dose level of the drug. The measured response is the protective strength of the drug against the virus culture. Due to a prob- lem with a few of the test tubes, only two responses were obtained for dose levels 4, 8, and 32. The data are given here: Dose level 2 16 32 64 Response 5,73 10, 14 15, 17 20, 21, 19 23, 29 28, 31, 30 a. Plot the data. b. Fit a linear regression model to these data. c. From a plot of the residuals, does there appear to be a possible lack of fit of the linear model?

11.40 In the preliminary studies of a new drug, a pharmaceutical firm needs to obtain infor- mation on the relationship between the dose level and potency of the drug. In order to obtain this information, a total of 18 test tubes are inoculated with a virus culture and incubated for an appropriate period of time. Three test tubes are randomly assigned to each of six different dose levels. The 18 test tubes are then injected with the randomly assigned dose level of the drug. The measured response is the protective strength of the drug against the virus culture. Due to a prob- lem with a few of the test tubes, only two responses were obtained for dose levels 4, 8, and 32. The data are given here: Dose level 2 16 32 64 Response 5,73 10, 14 15, 17 20, 21, 19 23, 29 28, 31, 30 a. Plot the data. b. Fit a linear regression model to these data. c. From a plot of the residuals, does there appear to be a possible lack of fit of the linear model?

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
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QUESTION 8 Problem 11.40db: Consider the "Pure Experimental Error". Report the Mean-Square Pure Experimental Error. Use 3 decimals for your answer Hiint: L-26: p 6-7 (Ex. 11.39a)
Transcribed Image Text:QUESTION 8 Problem 11.40db: Consider the "Pure Experimental Error". Report the Mean-Square Pure Experimental Error. Use 3 decimals for your answer Hiint: L-26: p 6-7 (Ex. 11.39a)
11.40 In the preliminary studies of a new drug, a pharmaceutical firm needs to obtain infor- mation on the relationship between the dose level and potency of the drug. In order to obtain this information, a total of 18 test tubes are inoculated with a virus culture and incubated for an appropriate period of time. Three test tubes are randomly assigned to each of six different dose levels. The 18 test tubes are then injected with the randomly assigned dose level of the drug. The measured response is the protective strength of the drug against the virus culture. Due to a prob- lem with a few of the test tubes, only two responses were obtained for dose levels 4, 8, and 32. The data are given here: Dose level 2 8 16 32 64 Response 5,73 10, 14 15, 17 20, 21, 19 23, 29 28, 31, 30 a. Plot the data. b. Fit a linear regression model to these data. c. From a plot of the residuals, does there appear to be a possible lack of fit of the linear model?
Transcribed Image Text:11.40 In the preliminary studies of a new drug, a pharmaceutical firm needs to obtain infor- mation on the relationship between the dose level and potency of the drug. In order to obtain this information, a total of 18 test tubes are inoculated with a virus culture and incubated for an appropriate period of time. Three test tubes are randomly assigned to each of six different dose levels. The 18 test tubes are then injected with the randomly assigned dose level of the drug. The measured response is the protective strength of the drug against the virus culture. Due to a prob- lem with a few of the test tubes, only two responses were obtained for dose levels 4, 8, and 32. The data are given here: Dose level 2 8 16 32 64 Response 5,73 10, 14 15, 17 20, 21, 19 23, 29 28, 31, 30 a. Plot the data. b. Fit a linear regression model to these data. c. From a plot of the residuals, does there appear to be a possible lack of fit of the linear model?
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