The Basic Practice of Statistics
8th Edition
ISBN: 9781319057916
Author: Moore
Publisher: MAC HIGHER
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Question
Chapter 15, Problem 15.16CYS
To determine
To identify: Whether the boldface number is a sampling distribution or statistic or parameter.
Expert Solution & Answer
Answer to Problem 15.16CYS
The correct option is (b) statistic.
Explanation of Solution
Given info:
The data shows that the percentage of people interviewed were employed is 4.9% and the sample number of households is 60,000.
Reason for correct answer:
Here, the percentage 4.9% is obtained by using the sample of 60,000 households and explains the characteristic of the sample.
Thus, the boldface number is a statistic.
The correct option is (b) statistic.
Reason for incorrect answers:
Since, the percentage 4.9% is obtained by using the sample the options (a) sampling distribution and (c) parameter are incorrect.
Conclusion:
Thus, the boldface number is statistic.
Statistics Concept Introduction
Introduction:
Sampling distribution:
It is the distribution of observations obtained by using the statistic of all the possible samples taken from the population. Here, the size of the all possible samples is same.
Parameter:
A parameter is a value that explains the characteristic of the population. In general, the parameter is estimated by using the sample, because it is difficult to examine the total population.
Statistic:
A statistic is a value that explains the characteristic of the sample. It can be obtained by using the sample of observations.
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I just need to know why this is wrong below:
What is the test statistic W? W=5 (incorrect)
and
What is the p-value of this test? (p-value < 0.001-- incorrect)
Use the Wilcoxon signed rank test to test the hypothesis that the median number of pages in the statistics books in the library from which the sample was taken is 400. A sample of 12 statistics books have the following numbers of pages
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What is the sum of the negative ranks (W-)? 75 What is the sum of the positive ranks (W+)? 5What type of test is this? two tailedWhat is the test statistic W? 5 These are the critical values for a 1-tailed Wilcoxon Signed Rank test for n=12
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0.1
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ons
12. A sociologist hypothesizes that the crime rate is higher in areas
with higher poverty rate and lower median income. She col-
lects data on the crime rate (crimes per 100,000 residents),
the poverty rate (in %), and the median income (in $1,000s)
from 41 New England cities. A portion of the regression results
is shown in the following table.
Standard
Coefficients
error
t stat
p-value
Intercept
-301.62
549.71
-0.55 0.5864
Poverty
53.16
14.22
3.74 0.0006
Income
4.95
8.26
0.60 0.5526
a.
b.
Are the signs as expected on the slope coefficients?
Predict the crime rate in an area with a poverty rate of
20% and a median income of $50,000.
3. Using data from 50 work
2. The owner of several used-car dealerships believes that the
selling price of a used car can best be predicted using the car's
age. He uses data on the recent selling price (in $) and age of
20 used sedans to estimate Price = Po + B₁Age + ε. A portion
of the regression results is shown in the accompanying table.
Standard
Coefficients
Intercept
21187.94
Error
733.42
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28.89 1.56E-16
Age
-1208.25
128.95 -9.37
2.41E-08
a. What is the estimate for B₁? Interpret this value.
b. What is the sample regression equation?
C. Predict the selling price of a 5-year-old sedan.
Chapter 15 Solutions
The Basic Practice of Statistics
Ch. 15.1 - Prob. 1AYKCh. 15.1 - Prob. 2AYKCh. 15.1 - Prob. 3AYKCh. 15.2 - Prob. 4AYKCh. 15.2 - Prob. 5AYKCh. 15.3 - Prob. 6AYKCh. 15.3 - Prob. 7AYKCh. 15.4 - Prob. 8AYKCh. 15.4 - Prob. 9AYKCh. 15.4 - Prob. 10AYK
Ch. 15.5 - Prob. 11AYKCh. 15.5 - Prob. 12AYKCh. 15.5 - Prob. 13AYKCh. 15.6 - Prob. 14AYKCh. 15.6 - Prob. 15AYKCh. 15 - Prob. 15.16CYSCh. 15 - Prob. 15.17CYSCh. 15 - Prob. 15.18CYSCh. 15 - Prob. 15.19CYSCh. 15 - Prob. 15.20CYSCh. 15 - Prob. 15.21CYSCh. 15 - Prob. 15.22CYSCh. 15 - Prob. 15.23CYSCh. 15 - Prob. 15.24ECh. 15 - Prob. 15.25ECh. 15 - Prob. 15.26ECh. 15 - Prob. 15.27ECh. 15 - Prob. 15.28ECh. 15 - Prob. 15.29ECh. 15 - Prob. 15.30ECh. 15 - Prob. 15.31ECh. 15 - Prob. 15.32ECh. 15 - Prob. 15.33ECh. 15 - Prob. 15.34ECh. 15 - Prob. 15.35ECh. 15 - Prob. 15.36ECh. 15 - Prob. 15.37ECh. 15 - Prob. 15.38ECh. 15 - Prob. 15.39ECh. 15 - Prob. 15.40ECh. 15 - Prob. 15.41ECh. 15 - Prob. 15.42ECh. 15 - Prob. 15.43E
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