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Question: Osteoporosis is a degenerative disease that primarily affects women over the age of 60. A research analyst wants to forecast sales of Strong Bones, a prescription drug for treating this debilitating disease. She uses the model Sales = β0 + β1 Pop + β2lnc + ε, where Sales refers to the sales of Strong Bones ($ millions), Pop is the number of women over the age of 60 (in millions), and Inc is the average income of women over the age of 60 ($1,000s). She collects data on 38 cities across the United States and obtains the following relevant regression results:
a. What is the sample regression equation?
b. Interpret the slope coefficients.
c. Predict sales if a city has 1.5 million women over the age of 60 and their average income is $44,000.
Suppose that the height of a typical American female is normally distributed with µ = 64 inches and s = 4 inches. We observe the height of 500 American females.
The details were even more disturbing: "Errors by air traffic controllers climbed from 746 in fiscal 1997 to 878 in fiscal 1998, an 18% increase." So, are the risks of a fatal airline crash or an air traffic control error something that should be ..
If someone s chances of surviving were the same regardless of their status on the ship, how many members of the crew would you expect to have lived?
Assume that IQ scores follow a normal distribution with a mean of 100 and a standard deviation of 16. Use the empirical rule to answer the following questions. What percentage of people score between 84 and 116? What percentage of people score les..
Canada has two official languages, English and French. Choose a Canadian at random and ask, "What is your mother tongue?
Find the probability of getting at most 25 lefties assuming that they are chosen with a process designed to yield a 12% rate of lefties.
Let X be the number of Bernoulli (p) trials required to produce at least one success and at least one failure. Find:
Ten percent of the items produced at a plant are defective. A random sample of 20 items is selected. What is the probability that more than three items in the sample are defective?
Still rockin'. Crowd Management Strategies monitors accidents at rock concerts. In their database, they list the names and other variables of victims.
Suppose that beer consumption and religious affiliation are not independent of each other. That means that
What is the conditional probability of a manager in the Division of Community Services reporting workplace sexual harassment?
What proportion of the year 2008 sample was opposed to the death penalty? What proportion of the year 1993 sample was opposed?
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