Resistance training is a popular form of conditioning aimed at enhancing sports

Question

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 2 = 325.459 for this table. From the table of critical values, we can say that the P-value is which of the following?

between 0.0025 and 0.001

between 0.001 and 0.0005    

less than 0.0005

Explanation / Answer

Ans:

There are four age categories "8–13," "14–18," "19–22," and "23–30."

df=(2-1)*(4-1)=3

Test statistic:

chi-square statistic 2 = 325.459

p-value=CHIDIST(325.459,3)=0

So,p-value<0.0005

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