Reference no: EM1396406
Question 1: Consider the following data on 20 chemical reactions, with Y = chromatographic retention time (seconds) and X = molecular weight (gm/mole).
(a) Make a scatter plot.
(b) Use Excel to fit the regression, with fitted equation and R2.
Question 2: In the following regression, X = weekly pay, Y = income tax withheld, and n = 35 McDonald's employees.
(a) Write the fitted regression equation.
(b) State the degrees of freedom for a two- tailed test for a zero slope, and use Appendix D to find the critical value at alpha = .05.
(c) What is your conclusion about the slope?
(d) Interpret the 95 percent confidence limits for the slope.
(e) Verify that F = t2 for the slope.
(f) In your own words, describe the fit of this regression.
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Interpreting regression output
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Completing regression analyses
: Consider the following data on 20 chemical reactions, with Y = chromatographic retention time (seconds) and X = molecular weight (gm/mole).
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