Data for Exercise 7.68

Kinder

## Format

A data frame/tibble with eight observations on three variables

pair

a numeric indicator of pair

kinder

reading score of kids who went to kindergarten

nokinder

reading score of kids who did not go to kindergarten

## References

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

## Examples


boxplot(Kinder$kinder, Kinder$nokinder)

diff <- Kinder$kinder - Kinder$nokinder
qqnorm(diff)
qqline(diff)

shapiro.test(diff)
#>
#> 	Shapiro-Wilk normality test
#>
#> data:  diff
#> W = 0.87923, p-value = 0.1852
#>
t.test(Kinder$kinder, Kinder$nokinder, paired = TRUE)
#>
#> 	Paired t-test
#>
#> data:  Kinder$kinder and Kinder$nokinder
#> t = 2.1166, df = 7, p-value = 0.07208
#> alternative hypothesis: true difference in means is not equal to 0
#> 95 percent confidence interval:
#>  -0.2343599  4.2343599
#> sample estimates:
#> mean of the differences
#>                       2
#>
# Or
t.test(diff)
#>
#> 	One Sample t-test
#>
#> data:  diff
#> t = 2.1166, df = 7, p-value = 0.07208
#> alternative hypothesis: true mean is not equal to 0
#> 95 percent confidence interval:
#>  -0.2343599  4.2343599
#> sample estimates:
#> mean of x
#>         2
#>
rm(diff)