math 1280 Final Exam 2025 COMPREHENSIVE EXAM QUESTIONS
math 1280 Final Exam
WITH DETAILED VERIFIED AND 100% CORRECT ANSWERS BRAND
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NEW EXAM ALREADY GRADED A+!!
1. You are interested in the number of English-speaking b
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
2. What is the mean of x? x <- c(12, 14, 11, 14, 13, 15, 12, b
16, 10)
Select one: a. 12 b. 13 c. 14 d. 15 e. 16
3. Using the value of x from the prior question, what is e
the standard deviation of x?
Select one: a. 1 b. 3.75 c. 9 d. sqrt(13) e. 1.94
4. There was a very short quiz with five questions. The fol- b
lowing 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
5. 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
1/5
, math 1280 Final Exam
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6. Which distributions are discrete? e
Select one: a. the normal distribution and the Poisson
distribution. b. the Poisson distribution, the binomial
distribution, and the uniform distribution. c. the bino-
mial distribution and the exponential distribution. d.
the Poisson distribution, the binomial distribution, and
the normal distribution. e. none of the answers above
are accurate
7. What is the expected number of successes (balloons d
popped) when throwing 5 darts (rounded to two deci-
mal places)?
Select one: a. 1.41 b. 1.00 c. 2.50 d. 0.75 e. 0.50
8. What is the probability of getting 4 or more successes a
(popped balloons) in 5 throws (rounded to two decimal
places)?
Select one: a. .00 b. .98 c. .07 d. .33 e. .12
9. A Poisson distribution called Q has an expectation of c
4. Which of the following R commands would tell you
the probability that a randomly selected value from Q
is less than 6 and greater than or equal to 4 (read the
question carefully):
Select one: a. ppois(6, 4) - ppois(3, 4) b. ppois(6, lamb-
da=4) - ppois(4, lambda=4) c. ppois(5, 4) - ppois(3, 4) d.
ppois(5, 4) - ppois(4, 4) e. ppois(6 - 4, lambda=4)
10. e
2/5
math 1280 Final Exam
WITH DETAILED VERIFIED AND 100% CORRECT ANSWERS BRAND
Study online at https://quizlet.com/_hcdzqn
NEW EXAM ALREADY GRADED A+!!
1. You are interested in the number of English-speaking b
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
2. What is the mean of x? x <- c(12, 14, 11, 14, 13, 15, 12, b
16, 10)
Select one: a. 12 b. 13 c. 14 d. 15 e. 16
3. Using the value of x from the prior question, what is e
the standard deviation of x?
Select one: a. 1 b. 3.75 c. 9 d. sqrt(13) e. 1.94
4. There was a very short quiz with five questions. The fol- b
lowing 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
5. 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
1/5
, math 1280 Final Exam
Study online at https://quizlet.com/_hcdzqn
6. Which distributions are discrete? e
Select one: a. the normal distribution and the Poisson
distribution. b. the Poisson distribution, the binomial
distribution, and the uniform distribution. c. the bino-
mial distribution and the exponential distribution. d.
the Poisson distribution, the binomial distribution, and
the normal distribution. e. none of the answers above
are accurate
7. What is the expected number of successes (balloons d
popped) when throwing 5 darts (rounded to two deci-
mal places)?
Select one: a. 1.41 b. 1.00 c. 2.50 d. 0.75 e. 0.50
8. What is the probability of getting 4 or more successes a
(popped balloons) in 5 throws (rounded to two decimal
places)?
Select one: a. .00 b. .98 c. .07 d. .33 e. .12
9. A Poisson distribution called Q has an expectation of c
4. Which of the following R commands would tell you
the probability that a randomly selected value from Q
is less than 6 and greater than or equal to 4 (read the
question carefully):
Select one: a. ppois(6, 4) - ppois(3, 4) b. ppois(6, lamb-
da=4) - ppois(4, lambda=4) c. ppois(5, 4) - ppois(3, 4) d.
ppois(5, 4) - ppois(4, 4) e. ppois(6 - 4, lambda=4)
10. e
2/5
