Point spreads of NFL games. During theNational Football League (NFL) season, Las Vegas oddsmakers establish a pointspread on each game for betting purposes. For example, the champion PittsburghSteelers were established as 7-point favorites over the Arizona Cardinals inthe 2009 Super BOWL The final scores of NFL games were compared against thefinal point spreads established by the oddsmakers in Chance (Fall 1998). Thedifference between the game outcome and point spread (called a point-spreaderror) was calculated for 240 NFL games. The mean and standard deviation of thepoint-spread errors are `x= -1.6and s= 13.3, Use this information to test the hypothesis that the true meanpoint-spread error for all NFL games differs from 0. Conduct the test at a= .01 and interpret the result.
Point spreads of NFL games. During theNational Football League (NFL) season, Las Vegas oddsmakers establish a pointspread on each game for betting purposes. For example, the champion PittsburghSteelers were established as 7-point favorites over the Arizona Cardinals inthe 2009 Super BOWL The final scores of NFL games were compared against thefinal point spreads established by the oddsmakers in Chance (Fall 1998). Thedifference between the game outcome and point spread (called a point-spreaderror) was calculated for 240 NFL games. The mean and standard deviation of thepoint-spread errors are `x= -1.6and s= 13.3, Use this information to test the hypothesis that the true meanpoint-spread error for all NFL games differs from 0. Conduct the test at a= .01 and interpret the result.
