Question

Thirty-two people were chosen at random from employees of a large company. Their commute times (in hours) were recorded in a table (shown on the right). 0.5 0.9 1.3 0.4 0.6 1.2 1.0 0.6 0.7 1.2 0.8 1.0 0.9 0.2 0.4 1.1 0.9 1.1 0.6 0.2 0.7 1.0 0.6 1.4 0.4 1.3 0.6 0.7 1.1 0.8 0.4 0.9

Answer 1

Class interval	Frequency	Relative Frequency
0.15-0.35	2	0.0625
0.35-0.55	5	0.15625
0.55-0.75	8	0.25
0.75-0.95	6	0.1875
0.95-1.15	6	0.1875
1.15-1.35	4	0.125
1.35-1.55	1	0.03125

Histogram A

11 P(n > 1) = = 0.34375 32

$P(n\leq 0.5)=\frac{7}{32}=0.21875$