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DAT 565 Wk 3 - Practice Wk 3 Knowledge Check Ramjac Company wants to set up k independent file servers, each capable of running the company’s intranet. Each server has average "uptime" of 98 percent. What must k be to achieve 99.999 percent probability that the intranet will be "up"? Multiple Choice
1
2
3
4
Events A and B are mutually exclusive when Multiple Choice
their joint probability is zero.
they are independent events.
P(A)P(B) = 0 P(A)P(B) = P(A | B)
The probability that event A occurs, given that event B has occurred, is an example of: Multiple Choice
a marginal probability.
a conditional probability
a joint probability.
more than one of the above.
The discrete random variable X is the number of students that show up for Professor Smith’s office hours on Monday afternoons. The table below shows the probability distribution for X. What is the probability that fewer than 2 students come to office hours on any given Monday? X P(X)
0 .40
1 .30
2 .20
Multiple Choice
.10
.40
.70
.90
3 .10
Total 1.00