MyLab Statistics with Pearson eText -- Standalone Access Card -- for Elementary Statistics Using Excel (My Stat Lab)
6th Edition
ISBN: 9780134748849
Author: Mario F. Triola
Publisher: PEARSON
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Chapter 2.4, Problem 2BSC
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To conclude: Gaining weight is a cause of increased blood pressure.
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To compare two elementary schools regarding teaching of reading skills, 12 sets of identical twins were used. In each case, one child was selected at random and sent to school A, and his or her twin was sent to school B. Near the end of fifth grade, an achievement test was given to each child. The results follow:
Twin Pair
1
2
3
4
5
6
School A
169
157
115
99
119
113
School B
123
157
112
99
121
122
Twin Pair
7
8
9
10
11
12
School A
120
121
124
145
138
117
School B
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90
124
140
142
102
Suppose a sign test for matched pairs with a 1% level of significance is used to test the hypothesis that the schools have the same effectiveness in teaching reading skills against the alternate hypothesis that the schools have different levels of effectiveness in teaching reading skills. Let p denote portion of positive signs when the scores of school B are subtracted from the corresponding scores of school…
A horse trainer teaches horses to jump by using two methods of instruction. Horses being taught by method A have a lead horse that accompanies each jump. Horses being taught by method B have no lead horse. The table shows the number of training sessions required before each horse performed the jumps properly.
Method A
25
23
39
29
37
20
Method B
41
21
46
42
24
44
Method A
45
35
27
31
34
49
Method B
26
43
47
32
40
Use a rank-sum test with a5% level of significance to test the claim that there is no difference between the training sessions distributions. If the value of the sample test statistic R, the rank-sum, is 150, calculate the P-value. Round your answer to four decimal places.
A data processing company has a training program for new salespeople. After completing the training program, each trainee is ranked by his or her instructor. After a year of sales, the same class of trainees is again ranked by a company supervisor according to net value of the contracts they have acquired for the company. The results for a random sample of 11 salespeople trained in the last year follow, where x is rank in training class and y is rank in sales after 1 year. Lower ranks mean higher standing in class and higher net sales.
Person
1
2
3
4
5
6
x rank
8
11
2
4
5
3
y rank
7
10
1
3
2
4
Person
7
8
9
10
11
x rank
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9
10
1
6
y rank
8
11
9
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5
Using a 1% level of significance, test the claim that the relation between x and y is monotone (either increasing or decreasing). Verify that the Spearman rank correlation coefficient . This implies that the P-value lies between 0.002 and 0.01. State…
Chapter 2 Solutions
MyLab Statistics with Pearson eText -- Standalone Access Card -- for Elementary Statistics Using Excel (My Stat Lab)
Ch. 2.1 - 1. McDonald’s Dinner Service Times Refer 10 the...Ch. 2.1 - Prob. 2BSCCh. 2.1 - Prob. 3BSCCh. 2.1 - Prob. 4BSCCh. 2.1 - In Exercise 5–8, identify the class width, class...Ch. 2.1 - Prob. 6BSCCh. 2.1 - Prob. 7BSCCh. 2.1 - Prob. 8BSCCh. 2.1 - Prob. 9BSCCh. 2.1 - Prob. 10BSC
Ch. 2.1 - Constructing Frequency Distributions. In Exercises...Ch. 2.1 - Constructing Frequency Distributions. In Exercises...Ch. 2.1 - Constructing Frequency Distributions. In Exercises...Ch. 2.1 - 14. Burger King Dinner Service Times Refer to Data...Ch. 2.1 - 15. Wendy’s Lunch Service Times Refer to Data Set...Ch. 2.1 - 16. Wendy’s Dinner Service Times Refer to Data Set...Ch. 2.1 - 17. Analysis of Last Digits Heights of statistics...Ch. 2.1 - 18. Analysis of Last Digits Weights of respondents...Ch. 2.1 - Prob. 19BSCCh. 2.1 - Prob. 20BSCCh. 2.1 - Prob. 21BSCCh. 2.1 - Prob. 22BSCCh. 2.1 - Categorical Data. In Exercises 23 and 24, use the...Ch. 2.1 - Prob. 24BSCCh. 2.1 - Prob. 25BSCCh. 2.1 - Prob. 26BSCCh. 2.1 - Prob. 27BSCCh. 2.1 - Prob. 28BSCCh. 2.1 - Prob. 29BBCh. 2.2 - 1. Heights Heights of adult males are normally...Ch. 2.2 - Prob. 2BSCCh. 2.2 - Prob. 3BSCCh. 2.2 - Prob. 4BSCCh. 2.2 - Interpreting a Histogram. In Exercises 5–8, answer...Ch. 2.2 - Interpreting a Histogram. In Exercises 5–8, answer...Ch. 2.2 - Interpreting a Histogram. In Exercises 5–8, answer...Ch. 2.2 - Interpreting a Histogram. In Exercises 5–8, answer...Ch. 2.2 - Constructing Histograms. In Exercises 9 –45,...Ch. 2.2 - Constructing Histograms. In Exercises 9–45,...Ch. 2.2 - Tornadoes Use the frequency distribution from...Ch. 2.2 - Constructing Histograms. In Exercises 9–45,...Ch. 2.2 - Tornadoes Use the frequency distribution from...Ch. 2.2 - Constructing Histograms. In Exercises 9–45,...Ch. 2.2 - Prob. 15BSCCh. 2.2 - Prob. 16BSCCh. 2.2 - Prob. 17BBCh. 2.2 - Prob. 18BBCh. 2.3 - 1. Body Temperatures Listed below are body...Ch. 2.3 - 2. Voluntary Response Data If we have a large...Ch. 2.3 - 3. Ethics There are data showing that smoking is...Ch. 2.3 - 4. CVDOT Section 2-1 introduced important...Ch. 2.3 - Pulse Rates Listed below are pulse rates (beats...Ch. 2.3 - Diastolic Blood Pressure Listed below are...Ch. 2.3 - Pulse Rates Refer to the data listed in Exercise...Ch. 2.3 - Diastolic Blood Pressure Refer to the data listed...Ch. 2.3 - Time-Series Graphs. In Exercises 9 and 10,...Ch. 2.3 - Time-Series Graphs. In Exercises 9 and 10,...Ch. 2.3 - Prob. 11BSCCh. 2.3 - Prob. 12BSCCh. 2.3 - Prob. 13BSCCh. 2.3 - Prob. 14BSCCh. 2.3 - Prob. 15BSCCh. 2.3 - Frequency Polygon. In Exercises 15 and 13,...Ch. 2.3 - Prob. 17BSCCh. 2.3 - Deceptive Graphs. In Exercises 17-20, identify how...Ch. 2.3 - Prob. 19BSCCh. 2.3 - Prob. 20BSCCh. 2.3 - Prob. 21BBCh. 2.4 - 1. Linear Correlation In this section we use r to...Ch. 2.4 - Prob. 2BSCCh. 2.4 - Prob. 3BSCCh. 2.4 - 4. Estimating r For each of the following,...Ch. 2.4 - Scatterplot. In Exercises 5 – 8, use the sample...Ch. 2.4 - Prob. 6BSCCh. 2.4 - Scatterplot. In Exercises 5 – 8, use the sample...Ch. 2.4 - Scatterplot. In Exercises 5 – 8, use the sample...Ch. 2.4 - Linear Correlation Coefficient In Exercises 9-12,...Ch. 2.4 - Linear Correlation Coefficient In Exercises 9-12,...Ch. 2.4 - Linear Correlation Coefficient In Exercises 9-12,...Ch. 2.4 - Prob. 12BSCCh. 2.4 - Prob. 13BBCh. 2.4 - Prob. 14BBCh. 2.4 - Prob. 15BBCh. 2.4 - Prob. 16BBCh. 2 - Prob. 1CQQCh. 2 - Prob. 2CQQCh. 2 - Prob. 3CQQCh. 2 - Prob. 4CQQCh. 2 - Prob. 5CQQCh. 2 - Prob. 6CQQCh. 2 - Prob. 7CQQCh. 2 - Prob. 8CQQCh. 2 - Prob. 9CQQCh. 2 - Prob. 10CQQCh. 2 - 1. Frequency Distribution of Body Temperatures...Ch. 2 - Prob. 2RECh. 2 - Prob. 3RECh. 2 - Prob. 4RECh. 2 - Prob. 5RECh. 2 - Prob. 6RECh. 2 - Prob. 7RECh. 2 - Prob. 8RECh. 2 - Prob. 1CRECh. 2 - Prob. 2CRECh. 2 - Histogram Construct the histogram corresponding to...Ch. 2 - Prob. 4CRECh. 2 - Prob. 5CRECh. 2 - Prob. 6CRECh. 2 - Prob. 1EP
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