II.9. Data on snakes. For a biology project, you measure the length (inches) and weight (ounces) of 12 snakes of the same variety. What units of measurement do each of the following have?
(a) The mean length of the snakes. (Hint: See page 277.)
(b) The first quartile of the snake lengths. (Hint: See page 270.)
(c) The standard deviation of the snake lengths. (Hint: See page 277.)
(d) The correlation between length and snake weight. (Hint: See page 325.)