Question

1. A chemist in interested in determining the weight loss of a particular compound as a function of the amount of time the compound is exposed to the air. The data below give the weight losses associated with settings of the exposure time.

                  Weight Loss (in pounds)           Exposure Time (in hours)

        ____________________________________________________

                          4.0                                                  4

                           6.0                                                  5

                                2.0                                             3

                           .                                                    .

                                 .                                                        .

                           9.0                                                  6

        ____________________________________________________

         Use the computer printout (below) to answer the questions.

* * * *   L I N E A R            R E G R E S S I O N   * * * *

Dependent Variable:     Weight Loss

Independent Variable: Exposure Time

                         Analysis of Variance

                              Sum of       Mean                             p

Sources     df      Squares     Squares          F          Value

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Regression     1      70.417       70.417           F_obs         .000

Residual       10       SS_res         MS_res       

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Total            11     84.917

---------- Variables in the Equation -----------

Variable                   B         SE B          t           p Value   

Exposure Time    2.167       0.311       6.969       0.000      

(Constant)          -5.833       1.745      -3.343       0.007

(h)     What is the value of MS_resin this study?

       TYPE YOUR ANSWER BELOW:

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         (i)      Find the test statistic (F_obs) in this study

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         (j)      Why do we perform the F test in this study?

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         (k)       Find the R squared value (the Coefficient of the Determination)

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(l)     Interpret the Coefficient of Determination.

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         (m)     Find the Correlation Coefficient

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(n)     Find the sample size

Answer 1