Manny insurancce comppanies are beginning to question the policy of offering reduced rates to owners of subcompact cars beccause the rate of serious and fatal accidents of subcompact cars is higher than that of larger-sized cars (compact cars and full size cars). To innvestigate this issue, a researcher made an analysis of accident data to determine the distribution of numbers of cases in whichh at least one individual was either fatally or critically injured for autommobiles of three sizzes. The data for 346 accidents are shown below. Do the data indicate the frequency of fatal or critical injuries in auto accidents depends on the size of automobiles? Assume α = 5%. Size of Automobiles Total Result Subcompact Compact Full Size Fatal or critical injury 67 26 16 No fatal or critical injury 128 63 46 Total 1. Write down your null and alternative hypotheses that can be used to test whether the frequency of fatal and critical injuries depends on the size of automobiles. H0: Ha: A. Write down your null and alternative hypotheses that can be used to test whether the frequency of fatal and critical injuries depends on the size of automobiles.H0:Ha: B. Null: The frequency of fatal and critical injuries does not depend on the size of automobiles. Alternative: The frequency of fatal and critical injuries depends on the size of automobiles.
Manny insurancce comppanies are beginning to question the policy of offering reduced rates to owners of subcompact cars beccause the rate of serious and fatal accidents of subcompact cars is higher than that of larger-sized cars (compact cars and full size cars). To innvestigate this issue, a researcher made an analysis of accident data to determine the distribution of numbers of cases in whichh at least one individual was either fatally or critically injured for autommobiles of three sizzes. The data for 346 accidents are shown below. Do the data indicate the frequency of fatal or critical injuries in auto accidents depends on the size of automobiles? Assume α = 5%.
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Size of Automobiles |
Total |
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Result |
Subcompact |
Compact |
Full Size |
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|
Fatal or critical injury |
67 |
26 |
16 |
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|
No fatal or critical injury |
128 |
63 |
46 |
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|
Total |
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1. Write down your null and alternative hypotheses that can be used to test whether the frequency of fatal and critical injuries depends on the size of automobiles.
H0:
Ha:
It is needed to test, whether the frequency of fatal or critical injuries in auto accidents depends on the size of automobiles.
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