Test scores for students who failed developmental mathematics in the fall semester 1995

Source: R/BSDA-package.R

Data for Exercise 6.47

Devmath

Format

A data frame/tibble with 40 observations on one variable

score

first exam score

Source

Data provided by Dr. Anita Kitchens.

References

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

Examples


EDA(Devmath$score)
#> [1] "Devmath$score"

#> Size (n)  Missing  Minimum   1st Qu     Mean   Median   TrMean   3rd Qu 
#>   40.000    0.000   39.000   65.500   74.400   76.500   74.917   87.750 
#>     Max.   Stdev.     Var.  SE Mean   I.Q.R.    Range Kurtosis Skewness 
#>  100.000   16.495  272.092    2.608   22.250   61.000   -0.521   -0.503 
#> SW p-val 
#>    0.095 
t.test(Devmath$score, mu = 80, alternative = "less")
#> 
#> 	One Sample t-test
#> 
#> data:  Devmath$score
#> t = -2.1471, df = 39, p-value = 0.01903
#> alternative hypothesis: true mean is less than 80
#> 95 percent confidence interval:
#>      -Inf 78.79436
#> sample estimates:
#> mean of x 
#>      74.4 
#>