- Description
QNT 275 Week 3 Quiz
Chapter 04, Section 4.2, Problem 015
Which of the following values cannot be probabilities of events?
15 0.94 -0.55 1.57 53 0.0 -27 1.0
Select all that apply.
-27
53
0.0
1.0
15
0.94
-0.55
1.57
Chapter 04, Section 4.2, Problem 017
The president of a company has a hunch that there is a 0.30 probability that the company will be successful in marketing a new brand of ice cream. Is this a case of classical, relative frequency, or subjective probability?
Relative frequency probability
Subjective probability
Classical probability
Chapter 04, Section 4.2, Problem 020
Correct.
A regular, six-sided die is rolled once.
Round your answers to four decimal places.
- What is the probability that a number less than 3 is obtained?
P(a number less than 3 is obtained)=
- What is the probability that a number 2 to 5 is obtained?
P(a number 2 to 5 is obtained)=
Chapter 04, Section 4.2, Problem 021
Correct.
A random sample of 1115 adults showed that 539 of them have shopped at least once on the Internet. What is the (approximate) probability that a randomly selected adult has shopped on the Internet?
Round your answer to three decimal places.
the tolerance is +/-5%
Chapter 05, Section 5.1, Problem 002a
Correct.
Classify the following random variable as discrete or continuous.
The time left on a parking meter.
Chapter 05, Section 5.1, Problem 002b
Correct.
Classify the following random variable as discrete or continuous.
The number of bats broken by a major league baseball team in a season.
Chapter 05, Section 5.2, Problem 07b
Correct.
The following table gives the probability distribution of a discrete random variable x.
x 0 1 2 3 4 5 6
P(x) 0.12 0.19 0.30 0.15 0.11 0.09 0.04
Find P(x≤2).
P(x≤2)=
exact number, no tolerance
Chapter 05, Section 5.4, Problem 029
Select each of the following experiments that are binomial experiments.
Drawing 3 balls with replacement from a box that contains 13 balls, 6 of which are red and7 are blue, and observing the colors of the drawn balls.
Selecting a few households from New York City and observing whether or not they own stocks when it is known that 30% of all households in New York City own stocks.
Drawing 3 balls without replacement from a box that contains 13 balls, 6 of which are red and 7 are blue, and observing the colors of the drawn balls.
Chapter 04, Section 4.2, Problem 019
Correct.
A hat contains 30 marbles. Of them, 17 are red and 13 are green. If one marble is randomly selected out of this hat, what is the probability that this marble is green?
Round your answer to two decimal places.
P(A)=
the tolerance is +/-5%
8th-ed Chapter 04, Section 4.3, Problem 046a
Correct.
A statistical experiment has eight equally likely outcomes that are denoted by 1,2,3,4,5,6,7, and 8. Let event A= and event B=.
The events A and B
mutually exclusive events.