EBK STATISTICS FOR THE BEHAVIORAL SCIEN
3rd Edition
ISBN: 9781506386249
Author: PRIVITERA
Publisher: VST
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Chapter 4.3, Problem 1.3LC
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Peggy conducted a study to identify the randomness of rainy days in fall. For 15 days, she recorded whether it rained that day or not. They denoted a rainy day with the letter R, a day without rain with the letter N.
R N N R R N N R R N N R R R R
Test the sequence for randomness. Use .
Consider the grades for the math and history exams for 10 students on a scale from 0 to 12 in the following table.
Student
Math
History
1
4
8
2
5
9
3
7
9
4
12
10
5
10
8
6
8
5
7
9
6
8
9
6
9
11
9
10
7
10
Compute the Spearman correlation coefficient. Round your answer to three decimal places.
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
153
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…
Chapter 4 Solutions
EBK STATISTICS FOR THE BEHAVIORAL SCIEN
Ch. 4.3 - Prob. 1.1LCCh. 4.3 - Prob. 1.2LCCh. 4.3 - Prob. 1.3LCCh. 4.3 - Prob. 1.4LCCh. 4.4 - Prob. 2.1LCCh. 4.4 - Prob. 2.2LCCh. 4.4 - Prob. 2.3LCCh. 4.5 - Prob. 3.1LCCh. 4.5 - Prob. 3.2LCCh. 4.5 - Prob. 3.3LC
Ch. 4.5 - Prob. 3.4LCCh. 4.5 - Prob. 3.5LCCh. 4.5 - Prob. 4.1LCCh. 4.5 - Prob. 4.2LCCh. 4.5 - Prob. 4.3LCCh. 4.6 - Prob. 5.1LCCh. 4.6 - Prob. 5.2LCCh. 4.6 - Prob. 5.3LCCh. 4.6 - Prob. 5.4LCCh. 4.7 - Prob. 6.1LCCh. 4.7 - Prob. 6.2LCCh. 4.7 - Prob. 6.3LCCh. 4.8 - Prob. 7.1LCCh. 4.8 - Prob. 7.2LCCh. 4.8 - Prob. 7.3LCCh. 4.8 - Prob. 7.4LCCh. 4.10 - Prob. 8.1LCCh. 4.10 - Prob. 8.2LCCh. 4.10 - Prob. 8.3LCCh. 4.10 - Prob. 8.4LCCh. 4 - Prob. 1FPCh. 4 - Prob. 2FPCh. 4 - Prob. 3FPCh. 4 - Prob. 4FPCh. 4 - Prob. 5FPCh. 4 - Prob. 6FPCh. 4 - Prob. 7FPCh. 4 - Prob. 8FPCh. 4 - Prob. 9FPCh. 4 - Prob. 10FPCh. 4 - Prob. 11CAPCh. 4 - Prob. 12CAPCh. 4 - Prob. 13CAPCh. 4 - Prob. 14CAPCh. 4 - Prob. 15CAPCh. 4 - Prob. 16CAPCh. 4 - Prob. 17CAPCh. 4 - Prob. 18CAPCh. 4 - Prob. 19CAPCh. 4 - Prob. 20CAPCh. 4 - Prob. 21CAPCh. 4 - Prob. 22CAPCh. 4 - Prob. 23CAPCh. 4 - Prob. 24CAPCh. 4 - Prob. 25CAPCh. 4 - Prob. 26CAPCh. 4 - Prob. 27CAPCh. 4 - Prob. 28CAPCh. 4 - Prob. 29CAPCh. 4 - Prob. 30CAPCh. 4 - Prob. 31CAPCh. 4 - Prob. 32PRCh. 4 - Prob. 33PRCh. 4 - Prob. 34PRCh. 4 - Prob. 35PRCh. 4 - Prob. 36PR
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- Sand and clay studies were conducted at a site in California. Twelve consecutive depths, each about 15 cm deep, were studied and the following percentages of sand in the soil were recorded. 34.4 27.1 30.8 28.0 32.2 27.6 32.8 25.2 31.4 33.5 24.7 28.4 Converting this sequence of numbers to a sequence of symbols A and B, where A indicates a value above the median and B denotes a value below the median gives ABABABABAABB. Test the sequence for randomness about the median with a 5% level of significance. Verify that the number of runs is 10. What is the upper critical value c2?arrow_forward29% of all college students major in STEM (Science, Technology, Engineering, and Math). If 46 college students are randomly selected, find the probability thata. Exactly 11 of them major in STEM. b. At most 12 of them major in STEM. c. At least 11 of them major in STEM. d. Between 11 and 15 (including 11 and 15) of them major in STEM.arrow_forwardSand and clay studies were conducted at a site in California. Twelve consecutive depths, each about 15 cm deep, were studied and the following percentages of sand in the soil were recorded. 27.3 34.6 30.6 27.8 33.4 31.5 27.3 31.2 32.0 24.7 24.4 28.2 Test this sequence for randomness about the median. Converting this sequence of numbers to a sequence of symbols A and B, where A indicates a value above the median and B denotes a value below the median gives BAABAABAABBB. Verify that the number of runs is 7, the lower critical number is 3, and the upper critical number is 11. Use a 5% level of significance. State the conclusion of the test and interpret your results.arrow_forward
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