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Point spreads of NFL games. Refer to the Chance (Fall
Chapter 7, Problem 129SE(choose chapter or problem)
Problem 129SE
Point spreads of NFL games. Refer to the Chance (Fall 1998) study of point-spread errors in NFL games, Exercise 7.41 (p. 379). Recall that the difference between the actual game outcome and the point spread established by odds makers—the point-spread error—was calculated for 240 NFL games. The results are summarized as follows: = -1.6, s = 13.3. Suppose the researcher wants to know whether the true standard deviation of the pointspread errors exceeds 15. Conduct the analysis using = .10.
Questions & Answers
QUESTION:
Problem 129SE
Point spreads of NFL games. Refer to the Chance (Fall 1998) study of point-spread errors in NFL games, Exercise 7.41 (p. 379). Recall that the difference between the actual game outcome and the point spread established by odds makers—the point-spread error—was calculated for 240 NFL games. The results are summarized as follows: = -1.6, s = 13.3. Suppose the researcher wants to know whether the true standard deviation of the pointspread errors exceeds 15. Conduct the analysis using = .10.
ANSWER:
Solution:
Step 1of 2:
The results are summarized as follows: =-1.6, s=13.3.
The point spread error was calculated for 240 NFL games.
The researcher wants to know whether the true standard deviation of the pointspread errors exceeds 15.
We have to conduct the analysis by using .