School Satisfaction

A questionnaire is randomly administered to 11 students from State School X and to 15 students from State School Y (the results have been ordered and stored in the data frame Stschool). Data are used in Example 9.11.

Format

A data frame with 26 observations on the following 4 variables:

X

satisfaction score

Y

satisfaction score

Satisfaction

combined satisfaction scores

School

a factor with levels X and Y

Source

Ugarte, M. D., Militino, A. F., and Arnholt, A. T. (2008) Probability and Statistics with R. Chapman & Hall/CRC.

Examples

with(data = Stschool,
t.test(X, Y, var.equal = TRUE))
#> 
#> 	Two Sample t-test
#> 
#> data:  X and Y
#> t = 2.0798, df = 24, p-value = 0.0484
#> alternative hypothesis: true difference in means is not equal to 0
#> 95 percent confidence interval:
#>   0.05691592 14.85217499
#> sample estimates:
#> mean of x mean of y 
#>  83.45455  76.00000 
#>