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Are Canadian professional hockey teams consistent over time? Here are the wins per season (out of 82 games) for the six Canadian teams in the National Hockey League (NHL). For comparison, in 1995-1996, the top team in the Eastern Conference was the Pittsburgh Penguins with 49 wins and the top team in the Western Conference was the Detroit Red Wings with 62 wins. In 2005-2006, the top team in the Eastern Conference was the Ottawa Senators with 52 wins, and the top team in the Western Conference was, once again, Detroit with 58 wins. (The Winnipeg Jets moved and became the Phoenix Coyotes in 1996, so we didn't include them here.)
a. What is the independent variable and what are its levels? What is the dependent variable?
b. Is this a between-groups or within-groups design? Explain.
c. Why might it be preferable to use a nonparametric hypothesis test for these data?
d. Conduct all six steps of hypothesis testing for a Wilcoxon signed-rank test for matched pairs.
e. How would you present these statistics in a journal article?
laptop use in middle school. refer to the american secondary education fall 2009 study of middle school students usage
Which variable would you use as the explanatory variable and which as the response variable? Why? What would you expect to see in the scatterplot? Discuss the likely direction, form, and strength.
assume that the density of chokecherry trees prunus virginiana in a degreaded forest is 32 trees per 1000m2nbspand
In a random sample of 26 people, the mean number of books they had read in the past year was 14.93 books and the standard deviation was 16.60 books.
Determine the least-squares regression line for predicting the rate of collision claims on the basis of theft frequency rating.- Calculate and interpret the values of r and r2.
Sample mean of $14.68 per hour. Assuming the population standard deviation of σ = $145, can we conclude that an increase occurred in the mean hourly earnings since 2001? Use α = .05.
Radioactive decay. An experiment was conducted using a Geiger-Mueller tube in a physics lab. Geiger-Mueller tubes respond to gamma rays and to beta particles (electrons). A pulse that corresponds to each detection of a decay product is produced, a..
In the previous exercise, you rejected the hypothesis of equal means. What does this imply about the accuracy of the confidence interval for the difference between the population means based on Student's T?
A manager at a local manufacturing company has been monitoring the output of one of the machines used to manufacture small aluminum plates.
Determine which variable is the dependent variable.
write the statement in symbols using the p and q given below. then construct a truth table for the symbolic statement
In a subway station, there are exactly enough customers on the platform to fill three trains. The arrival time of the nth train is X1 + ··· + Xn where X1, X2,... are iid exponential random variables with E[Xi] = 2 minutes.
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