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During the National Football League (NFL) season, Las Vegas odds makers establish a point spread on each game for betting purposes. For example, the Carolina Panthers were established as 3.5-point favorites over the eventual champion Denver Broncos in the 2016 Super Bowl. The final scores of NFL games were compared against the final point spreads established by the odds makers in Chance (Fall 1998). The difference between the game outcome and point spread (called a point-spread error) was calculated for 240 NFL games. The mean and standard deviation of the point-spread errors are 1.6 and 13.3, respectively.
Use this information to test the hypothesis that the true mean point-spread error for all NFL games is positive. Conduct the test at α = .10 and interpret the result.
the following are the numbers of defective parts produced in a shift by 10 workers before and after going through a
Investors commonly use the standard deviation of the monthly percentage return for a mutual fund as a measure of the risk for the fund; in such cases, a fund that has a larger standard deviation is considered more risky than a fund with a lower st..
Horse pregnancies. Bigger animals tend to carry their young longer before birth. The length of horse pregnancies from conception to birth varies.
A researcher conducted a study in which children with problems learning mathematics were offered the opportunity to purchase time with special tutors.
From the histogram, would you expect the mean or median to be larger? Explain.- Write a few sentences describing this distribution (shape, center, spread, unusual features).
If we use this sample as a basis for estimating the total number of defined words in the dictionary, how does the variation of these numbers.
suppose that incoming lots are 0.5 nonconforming. what is the probability of rejecting these lots under both
Perform risk response planning for your project by creating detailed risk response plans for those risks needing responses. This should include both proactive responses and reactive contingency plans as appropriate.
a usa snapshot titled are you getting a summer job? interviews with high school students produced the following.49
What is the expected number of interviews? What is the variance?- If there is enough time for only six interviews, how confident can he be of getting a job within the available time?
When Sam goes to a restaurant, he always tips the server $2 plus 10% of the cost of the meal. If Sam's distribution of meal costs has a mean of $9.
Birth days. During a 2-month period in 2002, 72 babies were born at the Tompkins Community Hospital in upstate New York.
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