Last year's records of auto accidents occurring on a given section of highway were classified according to whether the resulting damage was $1000 or more and to whether a physical injury resulted from the accident. The data follows:

a. Estimate the true proportion of accidents involving injuries when the damage was $1000 or more for similar sections of highway and find the margin of error.
b. Estimate the true difference in the proportion of accidents involving injuries for accidents with damage under $1000 and those with damage of $1000 or more. Use a 95% confidence interval.

Transcribed Image Text:

Number of Accidents Number Involving Injuries Under S1000 32 10 S1000 or More 41 23