Number of books read and final spelling scores for 17 third graders

Data for Exercise 9.53

Books

Format

A data frame/tibble with 17 observations on two variables

book

number of books read

spelling

spelling score

References

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

Examples

plot(spelling ~ book, data = Books)
mod <- lm(spelling ~ book, data = Books)
summary(mod)
#> 
#> Call:
#> lm(formula = spelling ~ book, data = Books)
#> 
#> Residuals:
#>     Min      1Q  Median      3Q     Max 
#> -23.519  -4.684   3.083   7.122  11.520 
#> 
#> Coefficients:
#>             Estimate Std. Error t value Pr(>|t|)    
#> (Intercept)  59.5186     3.8758  15.356 1.39e-10 ***
#> book          1.2330     0.2081   5.926 2.78e-05 ***
#> ---
#> Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1
#> 
#> Residual standard error: 9.542 on 15 degrees of freedom
#> Multiple R-squared:  0.7007,	Adjusted R-squared:  0.6807 
#> F-statistic: 35.11 on 1 and 15 DF,  p-value: 2.784e-05
#> 
abline(mod, col = "blue", lwd = 2)