MATH 1280 FINAL EXAM LATEST 2024 ACTUAL EXAM 100 QUESTIONS AND CORRECT DETAILED
ANSWERS
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 - (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 - (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 - (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 - (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 -
(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 - (answer) e
What is the expected number of successes (balloons popped) when throwing 5 darts (rounded to two
decimal places)?
ANSWERS
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 - (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 - (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 - (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 - (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 -
(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 - (answer) e
What is the expected number of successes (balloons popped) when throwing 5 darts (rounded to two
decimal places)?
