12. Given an exponential distribution with =20, what is the probability that the arrival time is

a. P(Arrival time<0.1)=_____

(Round to four decimal places as needed.)

b. P(Arrival time>0.1)=_____

(Round to four decimal places as needed.)

c. P(0.1

(Round to four decimal places as needed.)

d. P(Arrival time<0.1 or arrival time>0.2)=____________

(Round to four decimal places as needed.)

13. The following is a set of data from a sample of n=5. 8,2,7,8,9

a. Compute the first quartile (Q1), the third quartile (Q3), and the interquartile range.

b. List the five-number summary.

c. Construct a boxplot and describe the shape.

a. The first quartile is _______

The third quartile is__________

The interquartile range is________

b. The five-number summary is

_______, _____, ______, _____, ____ (use ascending order)

c. Identify the boxplot?

what shape is the data?

left skewed

right skewed

Symmetric