The Acme Company claims that its new reading lamp increases reading speed, and you want to test this. You will record how long (in seconds) it takes for participants to read a 1,000-word essay. Participants will be randomly assigned to one of four groups: Group 1 will be the control group; they will read the essay using regular room lighting. Those in Group 2 will read the essay using the Acme lamp. Those in Group 3 will read the essay using a generic reading lamp. Those in Group 4 will read the essay using a flashlight. Additionally, you will record the age of each participant (as the covariate).
Data set: Ch 06 – Exercise 09A.sav
Codebook
Variable: Group
Definition: Lighting group assignment
Type: Categorical (1 = Room lighting, 2 = Acme lamp, 3 = Generic lamp, 4 = Flashlight)
Variable: Seconds
Definition: The time it takes to read the essay
Type: Continuous
Variable: Age
Definition: Age
Type: Continuous

a. Write the hypotheses.
b. Run each criterion of the pretest checklist (homogeneity of regression slopes, homogeneity of variance [Levene’s test]) and discuss your findings.
c. Run the ANCOVA test and document your findings (ns, means, and Sig. [p value], hypotheses resolution).
d. Write an abstract under 200 words detailing a summary of the study, the ANCOVA test results, hypothesis resolution, and implications of your findings.