Bundle: Essentials of Statistics for The Behavioral Sciences, Loose-Leaf Version, 9th + LMS Integrated Aplia, 1 term Printed Access Card
9th Edition
ISBN: 9781337593885
Author: GRAVETTER
Publisher: CENGAGE L
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Textbook Question
Chapter 13, Problem 14P
Define each of the following terms:
- a. Factor
- b. Level
- c. Two-factor study
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Example 4 (Part 2) We can use Statkey to take 50 different random samples of size 20 each, find the mean of
each sample, and compute a confidence interval for each one. The graph of the sampling distribution of the means
is on the left below, and that of the 50 confidence intervals is on the right.
1. What does each dot on the left hand dotplot represent?
StatKey Sampling Distribution for a Mean
Percent with Internet Access (Countries) ▾
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20
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Sampling Dotplot of Mean
Left Tail Two-Tail Right Tail
60
50
40
40
30
20
20
10
samples = 50
mean = 41.626
std. error = 5.089
:
.:
:
::
0
25
30
35
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45
50
55
60
41.626
Data Plots
Confidence Intervals
95%->
Confidence Intervals
Coverage
48/50 = 96%
20
40
60
80
2. Circle the confidence intervals that failed to capture the true mean.
3. Circle the sample means that produced those…
Example 4 (Part 1) One of the datasets in the Lock book
contains information about 215 countries of the world. One
of the variables is the percentage of people in the country
who have access to the internet. We have data for 203 of
those countries. The plot on the right shows a dotplot of
the data.
1. What are the cases?
Population
n = 203, mean = 43.024
median = 43.5, stdev = 29.259
20
2. What does each dot on the dotplot represent?
15
10
5
20
40
43.024
60
80
3. What type of data is do we collect from the cases, quantitative or categorical?
Let x be a random variable that represents the percentage of successful free throws a professional basketball player makes in a season. Let y be a random variable that represents the percentage of successful field goals a professional basketball player makes in a season. A random sample of n =6 professional basketball players gave the following information.
x
63
79
70
80
84
87
y
46
49
45
55
57
58
Find Se. Round your answer to three decimal places.
Chapter 13 Solutions
Bundle: Essentials of Statistics for The Behavioral Sciences, Loose-Leaf Version, 9th + LMS Integrated Aplia, 1 term Printed Access Card
Ch. 13.1 - Where are individual differences located in the...Ch. 13.1 - What happens to the variability due to individual...Ch. 13.2 - What happens during the second stage of a...Ch. 13.2 - Prob. 2LCCh. 13.2 - For the following data, what are the df values for...Ch. 13.2 - The results of a repeated-measures ANOVA are...Ch. 13.3 - Prob. 1LCCh. 13.3 - A repeated-measures ANOVA produced an F-ratio of F...Ch. 13.4 - A two-factor study with two levels of factor A and...Ch. 13.4 - Which of the following accurately describes an...
Ch. 13.4 - Prob. 3LCCh. 13.5 - Which of the following accurately describes the...Ch. 13.5 - In a two-factor analysis of variance, the F-ratio...Ch. 13.5 - The following table shows the results for a...Ch. 13 - What is the relationship between the F-ratio for a...Ch. 13 - A researcher conducts an experiment comparing four...Ch. 13 - A researcher conducts a repeated-measures...Ch. 13 - The following data were obtained from a...Ch. 13 - The following data represent the results of a...Ch. 13 - One of the advantages of a repeated-measures...Ch. 13 - The following summary table presents the results...Ch. 13 - The following summary table presents the results...Ch. 13 - A researcher use a repeated-measures ANOVA to...Ch. 13 - A published report of a repealed-measures research...Ch. 13 - The following data are from a repeated-measures...Ch. 13 - The following data are from a repeated-measures...Ch. 13 - In Problem 6 at the end of Chapter 11 (page 325),...Ch. 13 - Define each of the following terms: a. Factor b....Ch. 13 - Explain what happens during each of the two stages...Ch. 13 - For the data in the following matrix: a. Which two...Ch. 13 - The following matrix presents the results from an...Ch. 13 - The following matrix presents the results of a...Ch. 13 - A researcher conducts an independent-measures,...Ch. 13 - A researcher conducts an independent-measures,...Ch. 13 - The following results are from an...Ch. 13 - The following results are from an...Ch. 13 - Most sports injuries are immediate and obvious,...Ch. 13 - The following table summarizes the results from a...Ch. 13 - The following table summarizes the results from a...Ch. 13 - Earlier in this chapter we described a study by...
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