Question: The data in the file < FATAL_CRASH_JUNE > give the number of fatal crashes per day in Australia during June 2016 and June 2017. A

The data in the file < FATAL_CRASH_JUNE > give the number of fatal crashes per day in Australia during June 2016 and June 2017.

A researcher wants to determine whether variation in the number of fatal crashes is due to chance variation or specialcause variation. (data obtained from the Australian Road Deaths Database accessed July 2017).

Separately for June of each year:

a. What is the mean number of fatal crashes per day?

b. Construct a c chart for the number of fatal crashes per day.

c. There were 7 fatal crashes on 10 June 2016. Is this large value explained by chance variation, or does it appear that special causes of variation occurred?

d. What conclusions can you draw from these data?

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