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A psychologist noted that people have more difficulty sleeping in a bright room than in a
dark room. She measured whether the intensity of the light could predict the time it took a
sample of 4 participants to fall asleep. The data for this hypothetical study are listed in the
following table.
Intensity of
Light (in watts) Time It Took to
Sleep (in minutes) X Y 5 7 10 16 20 27 40 33 Compute an analysis of regression for this hypothetical study. (Round your answers to two
decimal places.)
Source of
Variation SS df MS Fobt Regression
Residual (error)
Make a decision to retain or reject the null hypothesis. (Assume alpha equal to 0.05.)
Retain the null hypothesis. Reject the null hypothesis.

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