Use the information for Exercise 11 20 a Which class had the
Use the information for Exercise 11.20.
a. Which class had the highest sample mean number of TV hours, and which class had the lowest sample mean? (1 is for freshman, 2 is for sophomore, and so on.)
b. Write out the null and alternative hypotheses for the effect of class on TV hours.
c. Identify the F-value from the output.
d. Assuming that you found an association between class and TV hours, would that show that class caused the different levels of TV hours? Explain.
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