Data for Exercise 7.80

Vocab

## Format

A data frame/tibble with 14 observations on two variables

first

reading test score before formal vocabulary training

second

reading test score after formal vocabulary training

## References

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

## Examples

t.test(Vocab$first, Vocab$second, paired = TRUE)
#>
#> 	Paired t-test
#>
#> data:  Vocab$first and Vocab$second
#> t = -2.2958, df = 13, p-value = 0.03896
#> alternative hypothesis: true difference in means is not equal to 0
#> 95 percent confidence interval:
#>  -7.4866946 -0.2275911
#> sample estimates:
#> mean of the differences
#>               -3.857143
#>