Question

Use the following data to relate defective units of a drug to active milligrams and degrees...

Use the following data to relate defective units of a drug to active milligrams and degrees of temperature with multiple regression.

Milligrams 3 2 5 4 6
Defects 8 7 9 10 11
Grades F 84 87 83 90 93

Math   Statistics-And-Probability   
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Answer #1

using excel>data>data analysis>Regression

we have  

SUMMARY OUTPUT
Regression Statistics
Multiple R 0.961719
R Square 0.924904
Adjusted R Square 0.849807
Standard Error 0.612766
Observations 5
ANOVA
df SS MS F Significance F
Regression 2 9.249037 4.624518 12.31623 0.075096
Residual 2 0.750963 0.375482
Total 4 10
Coefficients Standard Error t Stat P-value Lower 95% Upper 95%
Intercept -6.37408 6.780632 -0.94004 0.446428 -35.5488 22.80062
Milligrams 0.743958 0.213319 3.487539 0.073293 -0.17388 1.661795
Grades 0.141856 0.081092 1.749334 0.222339 -0.20705 0.490766

the regression equation is

Defects = -6.374 +0.744*milligrams +0.142*Grades

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