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Question: The National Football League (NFL) is arguably the most successful professional sports league in the United States. Following the recent season, the commissioner's office staff performed an analysis in which a simple linear regression model was developed with average home attendance used as the dependent variable and the total number of games won during the season as the independent variable. The staff was interested in determining whether games won could be used as a predictor for average attendance. Develop the simple linear regression model. The data are in the file called NFL.
a. What percentage of total variation in average home attendance is explained by knowing the number of games the team won?
b. What is the standard error of the estimate for this regression model?
c. Using = 0.05, test to determine whether the regression slope coefficient is significantly different from 0.
d. After examining the regression analysis results, what should the NFL staff conclude about how the average attendance is related to the number of games the team won?
Sugar packaged by a certain machine has a mean weight of 5lb and a standard deviation of 0.02 lb. For what values of c can the manufacturer of the machinery claim that the sugar packaged by this machine has a weight between 5 - c and 5 + c lb with..
a. If the Ulleval University Hospital in Oslo requires special treatment for newborn babies weighing less than 2700 g, what is the percentage of newborn babies requiring special treatment?
Select a sample. Consider a population of 15 people. Use the Simple Random Sample applet to select a sample of size 5. Report the identification numbers of those selected in your sample.
The quality control manager for ENTA Inc. must decide whether to accept (a1), further analyze (a2) or reject (a3) a lot of incoming material. Assume the following payoff table is available.
Calculate the mean, median ,mode and standard deviation.What do these statistics suggest about the shape of the distribution?
1.students at university x must be in one of the class ranks freshman sophomore junior or senior. at university x 35 of
is the following distribution a probability distribution. explain your answer.x px0 0.361 0.232 0.083 0.144
two samples of size 25 each yielding x-bar 6.47 sx 1.14 y-bar 6.17 and sy 1.166 show a significant difference
Compute the incidence proportion or the risk ratio that compares group 1 to group 0, and compute the Incidence proportion or the risk ratio which compares group 2 to group 0. Then post a summary of your findings.
Do a complete regression analysis by performing the steps below. Note: No regression should be done when r is not significant. Draw a scatter plot. Compute the correlation coefficient.
Supposing that both populations are normally distributed, construct a 99% confidence interval for the ratio of the two population variances.
a nonprofit company concerned with the school dropout rate in a nearby state has designed a tutoring program aimed at
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