(25.28) Resistance training is a popular form of conditioning aimed at enhancing
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Question
(25.28) Resistance training is a popular form of conditioning aimed at enhancing sports performance and is widely used among high school, college, and professional athletes, although its use for younger athletes is controversial. A random sample of 4111 patients between the ages of 8 and 30 admitted to U.S. emergency rooms with the injury code “weightlifting” was obtained.These injuries were classified as “accidental” if caused by dropped weight or improper equipment use. The patients were also classified into the four age categories “8–13,” “14–18,” “19–22,” and “23–30.” Here is a two-way table of the results:
Software gives chi-square statistic = 325.459 for this table. From the table of critical values, we can say that the P-value is
A) between 0.001 and 0.0005. B) between 0.0025 and 0.001. C) less than 0.0005.Explanation / Answer
Answer
Based on the given data:
Software gives chi–square statistic 2 = 325.459 for this table. From the table of critical values, we can say that the value is
(a) between 0.001 and 0.0005.
(b) between 0.0025 and 0.001.
(c) less than 0.0005 - Correct Option (For the given data, the degree of freedom = number of categories -1 = 4-1 =3
The p-value corresponding to df = 3 and chi square value of 325.459 is < 0.0005)
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