Table 14.7.1 gives revenue (in thousands) for public elementary and secondary schools, by state, for 1997-1998 and

Question:

Table 14.7.1 gives revenue (in thousands) for public elementary and secondary schools, by state, for 1997-1998 and corresponding pupils per teacher for that state for 20 randomly selected states
(a) Obtain a dotplot and describe the pupils per teacher data.
(b) Identify any outliers and test for normality with and without outliers for the pupils per teacher data. If the data are not normal, does any simple transformation make the data normal?
(c) Obtain a 95% confidence interval for pupils per teacher.
(d) Obtain a scatterplot between total revenue and pupils per teacher.
(e) Fit a regression line between total revenue and pupils per teacher.
Table 14.7.1 School Revenue and Number of Pupils per Teacher