Stats
5th Edition
ISBN: 9780135163825
Author: De Veaux, Richard D., Velleman, Paul F., BOCK, David E.
Publisher: Pearson,
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Chapter 9, Problem 21E
a.
To determine
Write the regression equation.
b.
To determine
Find the predicted Salary (thousand dollars) of a secretary who has 10 years (120 months) of experience, 9th grade education (9 years of education), a score of 50 on the standardized test, 60 wpm typing speed, and the ability to take dictation in 30 wpm.
c.
To determine
Explain some possible causes that might make an apparent change of direction in the relationship between age and salary.
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28 Suppose that a mound-shaped data set has a
mean of 10 and standard deviation of 2.
a. About what percentage of the data should
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c. About what percentage of the data should
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27 Suppose that you have a data set of 1, 2, 2, 3,
3, 3, 4, 4, 5, and you assume that this sample
represents a population. The mean is 3 and g
the standard deviation is 1.225.10
a. Explain why you can apply the empirical
rule to this data set.
b. Where would "most of the values" in the
population fall, based on this data set?
30 Explain how you can use the empirical rule
to find out whether a data set is mound-
shaped, using only the values of the data
themselves (no histogram available).
Chapter 9 Solutions
Stats
Ch. 9.4 - Recall the regression example in Chapter 7 to...Ch. 9.4 - Prob. 2JCCh. 9.4 - Prob. 3JCCh. 9 - Prob. 1ECh. 9 - 2. Candy sales A candy maker surveyed chocolate...Ch. 9 - Prob. 3ECh. 9 - 4. Movie profits again A middle manager at an...Ch. 9 - Prob. 5ECh. 9 - 6. Movie residuals For the movies regression in...Ch. 9 - Prob. 7E
Ch. 9 - Prob. 8ECh. 9 - Prob. 9ECh. 9 - 10. More indicators For each of these potential...Ch. 9 - Prob. 11ECh. 9 - 12. More interpretations A household appliance...Ch. 9 - Prob. 13ECh. 9 - 14. Scottish hill races Hill running—races up and...Ch. 9 - Prob. 15ECh. 9 - Prob. 16ECh. 9 - Prob. 17ECh. 9 - Prob. 18ECh. 9 - Prob. 19ECh. 9 - Prob. 20ECh. 9 - 21. Admin performance The AFL-CIO has undertaken a...Ch. 9 - Prob. 22ECh. 9 - Prob. 23ECh. 9 - 24. Breakfast cereals We saw in Chapter 7 that the...Ch. 9 - Prob. 25ECh. 9 - Prob. 26ECh. 9 - Prob. 27ECh. 9 - *28. Candy bars with nuts The data on candy bars...Ch. 9 - Prob. 29ECh. 9 - Prob. 30E
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- The college hiking club is having a fundraiser to buy new equipment for fall and winter outings. The club is selling Chinese fortune cookies at a price of $2 per cookie. Each cookie contains a piece of paper with a different number written on it. A random drawing will determine which number is the winner of a dinner for two at a local Chinese restaurant. The dinner is valued at $32. Since fortune cookies are donated to the club, we can ignore the cost of the cookies. The club sold 718 cookies before the drawing. Lisa bought 13 cookies. Lisa's expected earnings can be found by multiplying the value of the dinner by the probability that she will win. What are Lisa's expected earnings? Round your answer to the nearest cent.arrow_forwardThe Honolulu Advertiser stated that in Honolulu there was an average of 659 burglaries per 400,000 households in a given year. In the Kohola Drive neighborhood there are 321 homes. Let r be the number of homes that will be burglarized in a year. Use the formula for Poisson distribution. What is the value of p, the probability of success, to four decimal places?arrow_forwardThe college hiking club is having a fundraiser to buy new equipment for fall and winter outings. The club is selling Chinese fortune cookies at a price of $2 per cookie. Each cookie contains a piece of paper with a different number written on it. A random drawing will determine which number is the winner of a dinner for two at a local Chinese restaurant. The dinner is valued at $32. Since fortune cookies are donated to the club, we can ignore the cost of the cookies. The club sold 718 cookies before the drawing. Lisa bought 13 cookies. Lisa's expected earnings can be found by multiplying the value of the dinner by the probability that she will win. What are Lisa's expected earnings? Round your answer to the nearest cent.arrow_forward
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