A study was conducted to determine if the number of head injuries was dependent on the...
A study was conducted to determine if the number of head injuries was dependent on the type of impact sport children played:
|
Number of Injuries |
No head injuries |
One head injury |
Two head injuries |
Three head injuries |
More than 3 head injuries |
|
Soccer |
45 |
25 |
11 |
10 |
5 |
|
Football |
66 |
15 |
8 |
5 |
10 |
|
Martial Arts |
28 |
21 |
12 |
8 |
6 |
|
Wrestling |
15 |
11 |
7 |
5 |
5 |
How many degrees of freedom are there?
What is the chi-squared test statistic? Round answer to two decimal places (i.e. 1.23)
What is the p-value? Round answer to three decimal places (i.e. 0.123)
What is your decision?
At the 5% significance level what can you conclude about the variables "number of head injuries" and "sport"
Homework Answers
The statistic software output for this problem is:
degrees of freedom = 12
chi-squared test statistic = 21.23
P-value = 0.0471
reject H0
WE can conclude about the variables "number of head injuries" and "sport" .
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