Question
In: Statistics and Probability
1.Which is relatively better: a score of 72 on a psychology test or a score of...
1.Which is relatively better: a score of 72 on a psychology test or a score of 62 on an economics test? Scores on the psychology test have a mean of 92 and a standard deviation of 12. Scores on the economics test have a mean of 63 and a standard deviation of 9.
A.The psychology test score is relatively better because its z score is less than the z score for the economics test score.
B.The economic test score is relatively better because its z score is less than the z score for the psychology test score.
C.The psychology test score is relatively better because its z score is greater than the z score for the economics test score.
D.The economics test score is relatively better because its z score is greater than the z score for the psychology test score.
2. Heights of men on a baseball team have a bell-shaped distribution with a mean of 170 cm and a standard deviation of 5 cm. Using the empirical rule, what is the approximate percentage of the men between the following values?
a.---------% of the men are between 160 cm and 180 cm.
b.----------%of the men are between 155 cm and 185 cm.
Solutions
orchestra answered 1 year agoRelated Solutions
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test. Then 16 more students take the test and their mean score is
62.8.
What is the mean score of all of these students together? Round to
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mean of the scores of all the students =
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Who did better? Peter with a score of 92 in a test with mean 71
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given a percentile rank ((PR) of a score. find the value of score: a) P=72 FOR...
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MEANS( X)AND STANDARD DEVIATION (SD)FOR
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Nurse Pretest -Score Post-test Score A &nbs
Nurse
Pretest -Score
Post-test Score
A
63
81
B
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90
C
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D
71
76
E
90
90
F
56
78
G
78
82
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1. The questions below relate to the following case study: System: Test Score System As a Systems Analyst, you are appointed to document requirements of a Test Score System. You are also required to study agile project management approach and apply it in the project. As part of the business process, the lecturer marks all the student papers, aggregates the scores and captures them. The Head of Department oversees the work of the lecturer. His duties in this regard include...
Brand Price ($) Score Bose 180 72 Scullcandy 150 78 Koss 84 66 Phillips/O'Neill 72 60...
Brand
Price ($)
Score
Bose
180
72
Scullcandy
150
78
Koss
84
66
Phillips/O'Neill
72
60
Denon
84
48
JVC
36
30
a. Does the t test indicate a
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2
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97
Sample Mean:
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Hypothesized population mean:
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119
Population Standard Deviation:
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Count (i.e., n):
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Standard Error of the Mean:
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Z Score:
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Alpha:
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Probability of Z with...
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