`R/BSDA-package.R`

`Kinder.Rd`

Data for Exercise 7.68

`Kinder`

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

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

```
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)
```