License records in a county reveal that 15% of cars are subcompacts, 25% compact
ID: 3435676 • Letter: L
Question
License records in a county reveal that 15% of cars are subcompacts, 25% compacts, 40% midsize, and the rest are an assortment of other styles and models. A random sample of accidents involving cars licensed in the county was drawn and is summarized below:
Subcompact
36
Compacts
58
Midsize
74
Other
29
Total:
197
What is the expected number of accidents in the compacts category?
Can we infer that certain sizes of cars are involved in a higher than expected number of accidents? Please provide your answers in the below answer sheet:
Significant? _________________ (Yes or No)
Test Statistic: ________________ (3 decimals)
p-value: ________________ (3 decimals)
Subcompact
36
Compacts
58
Midsize
74
Other
29
Total:
197
Explanation / Answer
License records in a county reveal that 15% of cars are subcompacts, 25% compacts, 40% midsize, and the rest are an assortment of other styles and models. A random sample of accidents involving cars licensed in the county was drawn and is summarized below:
What is the expected number of accidents in the compacts category? = 197*25/100 = 49.25
Goodness of Fit Test
observed
expected
O - E
(O - E)
Goodness of Fit Test
observed
expected
O - E
(O - E)
Related Questions
drjack9650@gmail.com
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.