Data for Exercise 7.82

`Spellers`

A data frame/tibble with ten observations on two variables

- teacher
character variable with values

`Fourth`

and`Colleague`

- score
score on a standardized spelling test

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

```
boxplot(score ~ teacher, data = Spellers, col = "pink")
t.test(score ~ teacher, data = Spellers)
#>
#> Welch Two Sample t-test
#>
#> data: score by teacher
#> t = -0.18515, df = 16.12, p-value = 0.8554
#> alternative hypothesis: true difference in means is not equal to 0
#> 95 percent confidence interval:
#> -8.710076 7.310076
#> sample estimates:
#> mean in group Colleague mean in group Fourth
#> 112.1 112.8
#>
```