Question 1

a) Find the measures of central tendency (mean and median) for the two variables: "Person Age" and "Collision Hour". Discuss the shape of these two distributions. Which measure of central tendency is best to represent the "Person Age" data: the mean or the median. (Hint: Use 10% rule). Discuss your rationale for the choice.

b)Find the measures of variability (range, IQR, variance and standard deviation) for the two variables: "Person Age" and "Collision Hour". c)Which one of the two variables, "Person Age" or "Collision Hour" is relatively more variable than the other? (Hint: use the CVs) Include the output as part of your report.

Question 2

Consider the claim that the average collision hour at the time when the data were collected was equal to 15 hours. Use the variable "Collision Hour" to test this claim. (Use the 5% level of significance).