STATS:DATA+MODELS-W/DVD
4th Edition
ISBN: 9780321986498
Author: DeVeaux
Publisher: PEARSON
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Chapter 25, Problem 22E
a.
To determine
Explain in context about the regression says.
b.
To determine
Discuss the value of the intercept by taking note of its P-value.
c.
To determine
Explain the meaning of the output
d.
To determine
Find the value of the standard error of the slope of the regression line.
e.
To determine
Explain the meaning of the standard error in the context.
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For unemployed persons in the United States, the average number of months of unemployment at the end of December 2009 was approximately seven months (Bureau of Labor Statistics, January 2010). Suppose the following data are for a particular region in upstate New York. The values in the first column show the number of
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West Virginia has one of the highest divorce rates in the nation, with an annual rate of approximately 5 divorces per 1000 people (Centers for Disease Control and Prevention website, January 12, 2012). The Marital Counseling Center, Inc. (MCC) thinks that the high divorce rate in the state may require them to hire additional staff.
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Excel File: data05-19.xls
x
10
f(x)
.05
20
30
.10
.10
40
.20
50
60
.35
.20
a. Is this probability distribution valid?
- Select your answer-
Explain.
f(x)
Σf(x)
Select your answer
Select your answer
b. What is the probability MCC will obtain more than 30 new clients (to 2 decimals)?
c. What is the probability MCC will obtain fewer than 20 new clients (to 2 decimals)?
d. Compute the expected value and variance of x.
Expected value
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clients per year
squared clients per year
For unemployed persons in the United States, the average number of months of unemployment at the end of December 2009 was approximately seven months (Bureau of Labor Statistics, January 2010). Suppose the following data are for a particular region in upstate New York. The values in the first column show the number of
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Unemployed
Number
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1
1029
2
1686
3
2269
4
2675
5
3487
6
4652
7
4145
8
3587
9
2325
10
1120
Let x be a random variable indicating the number of months a person is unemployed.
a. Use the data to develop an empirical discrete probability distribution for x (to 4 decimals).
(x)
f(x)
1
2
3
4
5
6
7
8
9
10
b. Show that your probability distribution satisfies the conditions for a valid discrete probability distribution.
The input in the box below will not be graded, but may be reviewed and considered by your instructor.
c. What is the probability that a person…
Chapter 25 Solutions
STATS:DATA+MODELS-W/DVD
Ch. 25.4 - Researchers in Food Science studied how big...Ch. 25.4 - Prob. 2JCCh. 25.4 - Prob. 3JCCh. 25 - Prob. 1ECh. 25 - Prob. 2ECh. 25 - Prob. 3ECh. 25 - Prob. 4ECh. 25 - Prob. 5ECh. 25 - Prob. 6ECh. 25 - Prob. 7E
Ch. 25 - Prob. 8ECh. 25 - Prob. 9ECh. 25 - Prob. 10ECh. 25 - Prob. 13ECh. 25 - Prob. 14ECh. 25 - Prob. 15ECh. 25 - Prob. 16ECh. 25 - Prob. 11ECh. 25 - Prob. 12ECh. 25 - Prob. 17ECh. 25 - Prob. 18ECh. 25 - Prob. 19ECh. 25 - Prob. 20ECh. 25 - Prob. 21ECh. 25 - Prob. 22ECh. 25 - Prob. 23ECh. 25 - Prob. 24ECh. 25 - Prob. 25ECh. 25 - Prob. 26ECh. 25 - Prob. 27ECh. 25 - Prob. 28ECh. 25 - Prob. 29ECh. 25 - Prob. 30ECh. 25 - Prob. 31ECh. 25 - Prob. 32ECh. 25 - Prob. 33ECh. 25 - Prob. 34ECh. 25 - Prob. 45ECh. 25 - 40. Fuel economy A consumer organization has...Ch. 25 - Prob. 36ECh. 25 - Prob. 46ECh. 25 - Prob. 37ECh. 25 - Prob. 38ECh. 25 - Prob. 39ECh. 25 - Prob. 54ECh. 25 - 40. SATs, again Consider the high school SAT...Ch. 25 - 46. Cereals A healthy cereal should be low in both...Ch. 25 - Prob. 42ECh. 25 - Prob. 43ECh. 25 - Prob. 44ECh. 25 - Prob. 47ECh. 25 - 52. Sales and profits A business analyst was...Ch. 25 - Prob. 49ECh. 25 - 54. More sales and profits Consider again the...Ch. 25 - Prob. 51ECh. 25 - Prob. 52ECh. 25 - Prob. 53ECh. 25 - Prob. 55ECh. 25 - Prob. 56ECh. 25 - Prob. 57ECh. 25 - Prob. 58ECh. 25 - 61. Education and mortality The following software...Ch. 25 - 62. Property assessments The following software...Ch. 25 - Prob. 61ECh. 25 - Prob. 62E
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