Multiple Choice: A state transportation department is determining the safety of
ID: 3154090 • Letter: M
Question
Multiple Choice: A state transportation department is determining the safety of roadways in a locality based on the age of drivers and number of traffic accidents. The department calculates a Pearson correlation coefficient of 0.295. If we determine that the critical value for r is 0.330, what would we conclude?
A) we should reject the null hypothesis
B) the age of drivers is significantly related to the number of traffic accidents
C) the age of drivers is not significantly related to the number of traffic accidents
D) the age of drivers is casually related to the number of traffic accidents they have
Explanation / Answer
The correlation is significant if it is larger in magnitude than the critical value.
As r = 0.295 < 0.330 = rcrit, then, it is not significant,
OPTION C: C) the age of drivers is not significantly related to the number of traffic accidents [ANSWER]
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