Data for Exercise 8.34

Vehicle

## Format

A data frame/tibble with 151 observations on two variables

make

a factor with levels domestic and foreign

rating

a factor with levels Much better than average, Above average, Average, Below average, and Much worse than average

## Source

Insurance Institute for Highway Safety and the Highway Loss Data Institute, 1995.

## References

Kitchens, L. J. (2003) Basic Statistics and Data Analysis. Pacific Grove, CA: Brooks/Cole, a division of Thomson Learning.

## Examples


T1 <- xtabs(~make + rating, data = Vehicle)
T1
#>           rating
#> make       Much better than average Above average Average Below average
#>   Foreign                        11             0      10             4
#>   Domestic                       30             9      38             7
#>           rating
#> make       Much worse than average
#>   Foreign                       12
#>   Domestic                      30
chisq.test(T1)
#> Warning: Chi-squared approximation may be incorrect
#>
#> 	Pearson's Chi-squared test
#>
#> data:  T1
#> X-squared = 4.6026, df = 4, p-value = 0.3306
#>