The following data set refers to the number of customers per day at a store in a mall during a 20-day period.

15	84	38	46	59	30	61	65	86	22
80	44	51	6	40	45	21	43	32	9

a. Identify the first, second, and third quartiles.

b. Determine the interquartile range.

a. The first quartile is

nothing,

the second quartile is

nothing,

and the third quartile is

nothing.

(Type integers or decimals.)

b. The interquartile range is

nothing.

(Type an integer or a decimal.)