Page 5 - Midterm Exam Questions

26.04.2020 M dterm Make-up

8. Calculate the mean and med an of the follow ng grade po nt averages.

3.1 3.8 3.9 2.2 2.3 3.6

Mean =
(Round to two dec mal places as needed.)
Med an =
(Round to two dec mal places as needed.)

9. The random var able x has the follow ng d screte probab l ty d str but on.
x 10 11 12 13 14
p(x) 0.2 0.2 0.1 0.2 0.3

S nce the values that x can assume are mutually exclus ve events, the event {x 12} s the un on of three mutually exclus ve events, {x 10} {x 11} {x 12}. ≤ = ∪ = ∪ =
Complete parts a through e.

a. F nd P(x 12).≤

P(x 12)≤ =

b. F nd P(x 12).>

P(x 12)> =

c. F nd P(x 14).≤

P(x 14)≤ =

d. F nd P(x 14).=

P(x 14)= =

e. F nd P(x 11 or x 12).≤ >

P(x 11 or x 12)≤ > =

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