Is there a most dangerous day of the week to drive? Search for “USA Car Accidents in 2011” in the StatCrunch data sets. This data set contains information regarding fatal traffic accidents in 2011. Frequency table results for DayOfWeek: Count = 72310
Is there a most dangerous day of the week to drive? Search for “USA Car Accidents in 2011” in the StatCrunch data sets. This data set contains information regarding fatal traffic accidents in 2011.
- Frequency table results for DayOfWeek:
Count = 72310
DayOfWeek Relative Frequency Sun 0.15923109 Mon 0.12362052 Tue 0.1188494 Wed 0.12009404 Thu 0.12852994 Fri 0.15616097 Sat 0.19351404
b.If the likelihood of a fatal traffic accident is actually the same for each day of the week, what would be the expected proportion of fatal accidents for any given day? (Hint: Think about rolling a die, but with more sides).
c.Perform a hypothesis test to determine if the proportion of fatal traffic accidents from (a) is significantly higher than the expected proportion found in (b). State the null/alternative hypotheses, test statistic, p-value, and your conclusion in the context of null hypothesis and in the context of the data.
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