Math 1280 Final Exam - Questions With Expert
Solutions
You are interested in the number of English-speaking people on the planet
who want to play a new kind of online video game. You asked 300 college
students if they were interested in playing video games, 100 said yes, and of
them 20 preferred your game to an existing game that is widely used. How
many people were in the sample?
Select one: a. The number of English-speaking people on the planet who want
to play a new kind of online video game. b. 300 c. 200 d. 100 e. 20 Correct
Answer - b
What is the mean of x? x <- c(12, 14, 11, 14, 13, 15, 12, 16, 10)
Select one: a. 12 b. 13 c. 14 d. 15 e. 16 Correct Answer - b
Using the value of x from the prior question, what is the standard deviation of
x?
Select one: a. 1 b. 3.75 c. 9 d. sqrt(13) e. 1.94 Correct Answer - e
There was a very short quiz with five questions. The following table shows the
number of correct answers and the cumulative relative frequency for those
scores in the class. value: 2 3 4 5 cumulative relative frequency: .13 .55 .925 1
What is the probability that a randomly selected student from the class scored
a 3 on the short quiz?
Select one: a. .13 b. .42 c. .55 d. .375 e. .925 Correct Answer - b
Use this information for the next three questions. A random variable called L
is defined by the following table, but one of the relative frequencies is missing:
value: -5 0 1 3 8 relative frequency: .17 .11 .23 .15 Correct Answer -
Which distributions are discrete?
Select one: a. the normal distribution and the Poisson distribution. b. the
Poisson distribution, the binomial distribution, and the uniform distribution.
c. the binomial distribution and the exponential distribution. d. the Poisson
distribution, the binomial distribution, and the normal distribution. e. none of
the answers above are accurate Correct Answer - e
Solutions
You are interested in the number of English-speaking people on the planet
who want to play a new kind of online video game. You asked 300 college
students if they were interested in playing video games, 100 said yes, and of
them 20 preferred your game to an existing game that is widely used. How
many people were in the sample?
Select one: a. The number of English-speaking people on the planet who want
to play a new kind of online video game. b. 300 c. 200 d. 100 e. 20 Correct
Answer - b
What is the mean of x? x <- c(12, 14, 11, 14, 13, 15, 12, 16, 10)
Select one: a. 12 b. 13 c. 14 d. 15 e. 16 Correct Answer - b
Using the value of x from the prior question, what is the standard deviation of
x?
Select one: a. 1 b. 3.75 c. 9 d. sqrt(13) e. 1.94 Correct Answer - e
There was a very short quiz with five questions. The following table shows the
number of correct answers and the cumulative relative frequency for those
scores in the class. value: 2 3 4 5 cumulative relative frequency: .13 .55 .925 1
What is the probability that a randomly selected student from the class scored
a 3 on the short quiz?
Select one: a. .13 b. .42 c. .55 d. .375 e. .925 Correct Answer - b
Use this information for the next three questions. A random variable called L
is defined by the following table, but one of the relative frequencies is missing:
value: -5 0 1 3 8 relative frequency: .17 .11 .23 .15 Correct Answer -
Which distributions are discrete?
Select one: a. the normal distribution and the Poisson distribution. b. the
Poisson distribution, the binomial distribution, and the uniform distribution.
c. the binomial distribution and the exponential distribution. d. the Poisson
distribution, the binomial distribution, and the normal distribution. e. none of
the answers above are accurate Correct Answer - e
