Tidy chi-squared test

A tidier version of chisq.test() for goodness of fit tests and tests of independence.

Usage

chisq_test(x, formula, response = NULL, explanatory = NULL, ...)

Arguments

x

A data frame that can be coerced into a tibble.

formula

A formula with the response variable on the left and the explanatory on the right. Alternatively, a response and explanatory argument can be supplied.

response

The variable name in x that will serve as the response. This is an alternative to using the formula argument.

explanatory

The variable name in x that will serve as the explanatory variable. This is an alternative to using the formula argument.

...

Additional arguments for chisq.test().

See also

Other wrapper functions: chisq_stat(), observe(), prop_test(), t_stat(), t_test()

Examples

# chi-squared test of independence for college completion
# status depending on one's self-identified income class
chisq_test(gss, college ~ finrela)
#> Warning: Chi-squared approximation may be incorrect
#> # A tibble: 1 × 3
#>   statistic chisq_df   p_value
#>       <dbl>    <int>     <dbl>
#> 1      30.7        5 0.0000108

# chi-squared goodness of fit test on whether self-identified
# income class follows a uniform distribution
chisq_test(gss,
           response = finrela,
           p = c("far below average" = 1/6,
                 "below average" = 1/6,
                 "average" = 1/6,
                 "above average" = 1/6,
                 "far above average" = 1/6,
                 "DK" = 1/6))
#> # A tibble: 1 × 3
#>   statistic chisq_df   p_value
#>       <dbl>    <dbl>     <dbl>
#> 1      488.        5 3.13e-103