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Sports and Leisure
Triathlons involve swimming, cycling, and running in succession over various distances. The July 2013 Sydenham Lakeside Olympic Triathlon near North Kingston, Ontario, featured a 1500-m swim, 40-km cycling course, and a 10-km run. A random sample of racers was obtained, and their finish times are given in the table below (in hours).
Food vendors at the finish line planned to stay for 2.5 hours. Is there any evidence to suggest that the mean time to finish this triathlon was more than 2.5 hours? Assume the underlying distribution is normal and use a 5 0.01.
Assume the least squares equation is Y' = 10 + 20X. What does the value of 20 indicate?
a researcher is considering using 90 confidence interval for his research project instead of 95. what happens to the
question the average 1-ounce chocolate chip cookie contains 110 calories. a random sample of 15 different brands of
(a) lie below -1.96Z if 1000 scores are plotted in the distribution? (b) are plotted between -1.96Z and +1.96Z ?
Give an example of a hypothesis test you could perform at work or at home. State what the Null and the Alternative hypotheses would be in your test.
In what different ways did Mongol rule affect the Islamic world, Russia, China, and Europe? How would you define the immediate and long-term significance of the Mongols in world history? In your view, does this offer a "balanced" perspective on th..
What is the probability that a student who has failed the test came from the South District?
A sample of sizen=10n=10is drawn from a population. The data is shown below.
Compare and contrast a Difference of Means test with a Paired Difference test. What, fundamentally, are we testing for in each? When do you use the difference of means?
Suppose that, for a t test, your computed value for t is +3.28. The critical value of t is +2.048. Explain what this means. Do you reject the null hypothesis or not?
Suppose the people living in a city have a mean score of 48 and a standard deviation score of 7 on a measure of concerns about the environment.
the shelf life of a particular type of battery is being studied. twenty batteries are tested and the mean shelf life of
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