Question
In: Statistics and Probability
Data show that men between the ages of 20 and 29 in a general population have...
Data show that men between the ages of 20 and 29 in a general population have a mean height of 69.3 inches, with a standard deviation of 2.9 inches. A baseball analyst wonders whether the standard deviation of heights of major-league baseball players is less than 2.9 inches. The heights (in inches) of 20 randomly selected players are shown in the table.
72
74
71
72
76
70
77
76
72
72
77
73
75
70
73
74
75
73
74
73
Solutions
Expert Solution
From the given sample data : n=20 , 
, 
The sample standard deviation is ,
Hypothesis : 
Vs 
The test statistic is ,
Teh critical value is ,
The Excel function is , =CHIINV(0.95,19)
Decision : Here , teh value of the test statistic lies in the rejection region
Therefore , reject Ho.
Conclusion : Hence , at the 5% significance level , there is sufficient evidence to support the claim that the standard deviation of heights of major-league baseball players is less than 2.9 inches.
orchestra answered 2 years agoRelated Solutions
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Data show that men between the ages of 20 and 29 in a general
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72
74
71
72
76...
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in
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Data obtained from the National Center for Health Statistics show that men between the ages of...
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show that men between the ages of 20 and 29 have a mean height of
69.3 inches, with a standard deviation of 2.9 inches. A baseball
analyst wonders whether the standard deviation of heights of
major-league baseball players is less than 2.9 inches. The heights
(in inches) of 20 randomly selected players are given below.
72
74
71
72
76
70
77
75
72
72
77
72
75
70
73
73...
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Data obtained from the National Center for Health Statisticsshow that men between the ages of...
Data obtained from the National Center for Health Statistics
show that men between the ages of 20 and 29 have a mean height of
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major-league baseball players is less than 2.9 inches. The heights
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