Question
The J.O. Supplies Company buys calculators from a Korean supplier. The probability of a defective calculator is 10%. If 100 calculators are selected at random,
The J.O. Supplies Company buys calculators from a Korean supplier. The probability of a
defective calculator is 10%.
If 100 calculators are selected at random, what is the expected number of defectives?
A. 9
B. 90
C. 10
D. 95
The J.O. Supplies Company buys calculators from a Korean supplier. The probability of a
defective calculator is 10%.
If 100 calculators are selected at random, what is the standard deviation of the number of
defectives?
A. 9.00
B. 3.17
C. 9.49
D. 3.00
Historical data shows that the average number of patient arrivals at the intensive care unit
of General Hospital is 3 patients every 2 hours. Assume that the patient arrivals are distributed
according to Poisson distribution.
Determine the probability of 6 patients arriving in a five-hour period.
A. .136
B. .109
C. .246
D. .001
Historical data shows that the average number of patient arrivals at the intensive care unit
of General Hospital is 3 patients every 2 hours. Assume that the patient arrivals are distributed
according to Poisson distribution.
Determine the probability of at least 4 but no more than 8 patients arriving in a three-hour
period.
A. .3813
B. .5711
C. .4276
D. .7861
E. .6174
During off hours, cars arrive at a tollbooth on the East-West toll road at an average rate of
0.5 cars per minute. The arrivals are distributed according to the Poisson distribution.
What is the probability that during the next five minutes three cars will arrive?
A. .2138
B. .1804
C. .0126
D. .0613
For a binomial process, the probability of success is 40% and the number of trials is 5.
Find the expected value.
A. 5.0
B. 1.2
C. 2.0
D. 1.1
For a binomial process, the probability of success is 40% and the number of trials is 5.
Find the variance.
A. 5.0
B. 1.2
C. 2.0
D. 1.1
For a binomial process, the probability of success is 40% and the number of trials is 5.
Find the standard deviation.
A. 5.0
B. 1.2
C. 2.0
D. 1.1
A lawyer believes that the probability is .3 that she can win a discrimination suit. If she
wins the case she will make $40,000, but if she loses she gets nothing. Assume that she has to
spend $5000 preparing the case. What is her expected gain?
A. $35,000
B. $7,000
C. $10,500
D. $9,000
The Post Office has established a record in a major Midwestern city for delivering 90% of
its local mail the next working day. If you mail eight local letters, what is the probability that
all of them will be delivered the next day.
A. 1.0
B. .4305
C. .8131
D. .5695
A car wash loses $30 on rainy days and makes $120 on days when it does not rain. If the
probability of rain is 0.15, calculate the car wash's expected profit.
A. $90
B. $76.50
C. $106.50
D. $97.50
A large disaster cleaning company estimates that 30% of the jobs it bids on are finished
within the bid time. Looking at a random sample of 8 jobs that is has contracted:
Calculate the probability that exactly 4 of the jobs were not completed within the bid time.
A. .0081
B. .2401
C. .0113
D. .1361
A large disaster cleaning company estimates that 30% of the jobs it bids on are finished
within the bid time. Looking at a random sample of 8 jobs that is has contracted:
Calculate the mean number of jobs completed within the bid time.
A. 4.0
B. 2.4
C. 2.0
D. 5.6
Suppose that x has a hypergeometric distribution with N = 10, r = 5 and n = 3. Calculate
the standard deviation of the distribution.
A. 0.583
B. 0.764
C. 1.500
D. 0.778
If in a hypergeometric distribution r is 300, N = 600 and n = 150, estimate the binomial
probability of success.
A. 0.500
B. 0.333
C. 0.083
D. 0.250
According to data from the state blood program, 40% of all individuals have group A
blood. If six (6) individuals give blood, find the probability
At least 3 of the individuals have group A blood.
A. .8208
B. .5443
C. .4557
D. .1792
Step by Step Solution
There are 3 Steps involved in it
Step: 1
Get Instant Access to Expert-Tailored Solutions
See step-by-step solutions with expert insights and AI powered tools for academic success
Step: 2
Step: 3
Ace Your Homework with AI
Get the answers you need in no time with our AI-driven, step-by-step assistance
Get Started