The amount of time (minutes) spent at a Smart Centre by 40 shoppers are given below.

40	59	34	25	38	28	28	40	24	41
14	59	52	9	53	27	59	4	22	42
30	43	51	37	36	54	32	44	12	51
44	12	38	40	41	42	35	17	50	39

a. Complete the following frequency distribution for the data.

Class	Frequency
0 to < 10
10 to < 20
20 to < 30
30 to < 40
40 to < 50
50 to < 60
Total	40

b. What is the class midpoint for the fourth class?

c. What proportion of the shoppers spent less than 30 minutes at the Smart Centre?

d. Is the distribution symmetric, skewed left, or skewed right?

(click to select)SymmetricSkewed LeftSkewed Right