Page 6 - Midterm Exam Questions
P. 6
26.04.2020 M dterm Make-up
10. The t me between customer arr vals at a furn ture store has an approx mate exponent al d str but on w th mean θ = 8.5 m nutes. If a customer just arr ved, f nd
the probab l ty that the next customer w ll not arr ve for at least 20 m nutes.
A. 0.346230
B. 0.095089
C. 0.653770
D. 0.904911
11. A local bakery has determ ned a probab l ty d str but on for the number of cheesecakes t sells n a g ven day. The d str but on s as follows:
Number sold n a day 0 5 10 15 20
Prob (Number sold) 0.15 0.10 0.18 0.06 0.51
F nd the number of cheesecakes that th s local bakery expects to sell n a day.
A. 13.4
B. 10
C. 20
D. 13.55
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