Children's age versus number of completed gymnastic activities

Data for Exercises 2.21 and 9.14

Gym

Format

A data frame/tibble with eight observations on three variables

age

age of child

number

number of gymnastic activities successfully completed

References

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

Examples

plot(number ~ age, data = Gym)
model <- lm(number ~ age, data = Gym)
abline(model, col = "red")

summary(model)
#> 
#> Call:
#> lm(formula = number ~ age, data = Gym)
#> 
#> Residuals:
#>     Min      1Q  Median      3Q     Max 
#> -3.5213 -0.5904 -0.1596  1.6117  1.8404 
#> 
#> Coefficients:
#>             Estimate Std. Error t value Pr(>|t|)   
#> (Intercept) -0.03191    2.01387  -0.016   0.9879   
#> age          1.63830    0.39881   4.108   0.0063 **
#> ---
#> Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1
#> 
#> Residual standard error: 1.933 on 6 degrees of freedom
#> Multiple R-squared:  0.7377,	Adjusted R-squared:  0.694 
#> F-statistic: 16.88 on 1 and 6 DF,  p-value: 0.0063
#>