The accompanying data represent the miles per gallon of a random sample of cars with a three-cylinder, 1.0 liter engine.

(a)

compute the z-score corresponding to the individual who obtained
37.8

miles per gallon. interpret this result.
(b)

determine the quartiles.

(c)

compute and interpret the interquartile range, iqr.

(d)

determine the lower and upper fences. are there anyoutliers?

31.5 36.0 37.8 38.5 40.1 42.2
34.2 36.2 38.1 38.7 40.6 42.5
34.7 37.3 38.2 39.5 41.4 43.4
35.6 37.6 38.4 39.6 41.7 49.3
the z-score corresponding to the individual is

and indicates that the data value is


standard deviation(s) the

the table is for the entire problem.