Expose marine bacteria to X-rays for time periods from 1 to 15 minutes. Here are
ID: 3428575 • Letter: E
Question
Expose marine bacteria to X-rays for time periods from 1 to 15 minutes. Here are the number of surviving bacteria (in hundreds) on a culture plate after each exposure time
(b)Repeat your work for the regression of the natural logarithm of count on time. Make a numerical comparison of the linearity of the two relationships. (Round your intercept to two decimal places and your slope to three decimal places.)
I found the regression line of count to be: Count= 259.58+-19.464
Time 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Count 355 211 197 166 142 106 104 60 56 38 36 32 21 19 15Explanation / Answer
Minitab used fo analysis
Before transformation
Coefficients
Term Coef SE Coef T-Value P-Value VIF
Constant 259.58 22.7 11.42 0.000
Time -19.464 2.50 -7.79 0.000 1.00
Regression Equation
Count = 259.58 - 19.464 Time
After transformation of count
Term Coef SE Coef T-Value P-Value VIF
Constant 5.9732 0.0598 99.92 0.000
Time -0.21843 0.00657 -33.22 0.000 1.00
Regression Equation
Log count = 5.97 - 0.218 Time
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