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Chapter 13: Q.13.1 (page 526)
How do we identify an-distribution and its corresponding F-curve?
By stating the two degrees of freedom, an F-distribution and its matching F-curve can be determined.
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We have provided data from independent simple random samples from several populations. In each case, determine the following items.
a. SSTR
b. MSTR
c. SSE
d. MSE
e. F
How many degrees of freedom does an -curve have? What are those degrees of freedom called?
Movie fans use the annual Leonard Maltin Movie Guide for facts, cast members, and reviews of more than films. The movies are rated from stars , indicating a very good movie, to 1 star , which Leonard Maltin refers to as a BOMB. The following table gives the running times, in minutes, of a random sample of films listed in one year's guide.
At the significance level, do the data provide sufficient evidence to conclude that a difference exists in mean running times among films in the four rating groups? (Note:,,
The data from independent simple random samples from several populations are given.
a. Compute SST, SSTR, and SSE by using the computing formulas.
b. Compare your results in part (a) for SSTR and SSE with those you obtained in Exercises , where you employed the defining formulas,
c. Construct a one-way ANOVA table.
d. Decide, at the 5% significance level, whether the data provide sufficient evidence to conclude that the means of the populations from which the samples were drawn are not all the same.
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