Statistics
4th Edition
ISBN: 9780393929720
Author: David Freedman, Robert Pisani, Roger Purves
Publisher: Norton, W. W. & Company, Inc.
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Chapter 14.3, Problem 2EC
a.
To determine
Find the fraction of contestants who step forward.
b.
To determine
Compute the fraction of contestants who step forward.
c.
To determine
Check whether any of these contestants step forward twice.
d.
To determine
Check whether the statement is true or false.
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The U.S. Postal Service will ship a Priority Mail® Large Flat Rate Box (12" 3 12" 3 5½") any
where in the United States for a fixed price, regardless of weight. The weights (ounces) of 20 ran
domly chosen boxes are shown below. (a) Make a stem-and-leaf diagram. (b) Make a histogram.
(c) Describe the shape of the distribution. Weights
72 86 28 67 64 65 45 86 31 32
39 92 90 91 84 62 80 74 63 86
(a) What is a bimodal histogram? (b) Explain the difference between left-skewed, symmetric, and right-skewed histograms. (c) What is an outlier
(a) Test the hypothesis.
Consider the hypothesis test Ho
=
:
against H₁o < 02. Suppose that the sample sizes aren₁ =
7 and n₂
= 13 and that
$²
= 22.4 and $22
= 28.2. Use α = 0.05.
Ho
is not
✓ rejected.
9-9
IV
(b) Find a 95% confidence interval on of 102. Round your answer to two decimal places (e.g. 98.76).
Chapter 14 Solutions
Statistics
Ch. 14.1 - Prob. 1EACh. 14.1 - Prob. 2EACh. 14.1 - Prob. 3EACh. 14.1 - Prob. 4EACh. 14.2 - Prob. 1EBCh. 14.2 - Prob. 2EBCh. 14.2 - Prob. 3EBCh. 14.2 - Prob. 4EBCh. 14.2 - Prob. 5EBCh. 14.2 - Prob. 6EB
Ch. 14.3 - Prob. 1ECCh. 14.3 - Prob. 2ECCh. 14.3 - Prob. 3ECCh. 14.3 - Prob. 4ECCh. 14.3 - Prob. 5ECCh. 14.4 - Prob. 1EDCh. 14.4 - Prob. 2EDCh. 14.4 - Prob. 3EDCh. 14.4 - Prob. 4EDCh. 14.4 - Prob. 5EDCh. 14.4 - Prob. 6EDCh. 14.4 - Prob. 7EDCh. 14.6 - Prob. 1RECh. 14.6 - Prob. 2RECh. 14.6 - Prob. 3RECh. 14.6 - Prob. 4RECh. 14.6 - Prob. 5RECh. 14.6 - Prob. 6RECh. 14.6 - Prob. 7RECh. 14.6 - Prob. 8RECh. 14.6 - Prob. 9RECh. 14.6 - Prob. 10RECh. 14.6 - Prob. 11RECh. 14.6 - Prob. 12RECh. 14.6 - Prob. 13RECh. 14.6 - Prob. 14RE
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