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Last ride. Consider the roller coasters described in Exercise 16 again. The regression analysis gives the model duration = 91.033 + 0.242 Drop.
a) Explain what the slope of the line says about how long a roller coaster ride may last and the height of the coaster.
b) A new roller coaster advertises an initial drop of 200 feet. How long would you predict the rides last?
c) Another coaster with a 150-foot initial drop advertises a 2-minute ride. Is this longer or shorter than you'd expect? By how much? What's that called?
Exercise :Roller coaster. People who responded to a July 2004 Discovery Channel poll named the 10 best roller coasters in the United States. A table in the last chapter's exercises shows the length of the initial drop (in feet) and the duration of the ride (in seconds). A regression to predict Duration from Drop has R2 = 12.4%.
a) What are the variables and units in this regression?
b) What units does the slope have?
c) Do you think the slope is positive or negative? Explain.
An elevator starts at the basement with 8 people (not including the elevator operator) and discharges them all by the time it reaches the top floor, number 6.
Computing the Z scores for the given data and evaluate µ and σ for the population.
a. What is the probability that the weekly demand for FGH products will exceed the level at 688? (mean 625, standard deviation of 225)
a researcher believes that the percentage of people who exercise in california is greater than the nation exercise
What additional information is obtained from measurements on an interval scale compared to measurements on an ordinal scale?
Label and describeeach step of the hypothesis testing procedure, and be sure to specify whether this is a one-tailed or two-tailed test.
1. a researcher examines the records of all registered voters in one city and finds that 43 are registered democrats.
Impact of Uncertainty on MNC Value Minneapolis Co. is a major exporter of products to Canada. Today, an event occurred that has increased the uncertainty surrounding the Canadian dollar's future value over the long term. Explain how this event ca..
What is the probability that more than 25% of the business travelers say that the reason for their most recent business trip was an internal company visit?
you have made calculations to test scores from 50 students are from a normal distribution. you calculate the mean score
assuming that both population s are normally distributed construct a 95 confidence interval about micro1 - micro2 .
of employees in a particular industry 60 are female. if employees are selected one at a time stopping as soon as a
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