With reference to Exercise 2.66,

(a) find the quartiles;

(b) find the minimum, maximum, range, and interquartile range;

(c) create a boxplot.

Data From Exercise 2.66 

2.66 A. A. Michelson (1852-1931) made many series of measurements of the speed of light. Using a revolving mirror technique, he obtained 12 30 30 27 30 39 18 27 48 24 18 for the differences (velocity of light in air) - (229,700) km/s (a) Create a dot diagram. (b) Find the median and the mean. Locate both on the dot diagram. (c) Find the variance and standard deviation.