MATH 1280 Exam | Verified Exam Questions and Answers | Latest
Updated Study Material 2026
Question:
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?
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. 2
Answer:
b. 300
Question:
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. 13
, Question:
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. 1.94
Question:
There was a very short quiz with ve questions. The following table shows the
number of
Answer:
s and the cumulative relative frequency for those scores in
Question:
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
Updated Study Material 2026
Question:
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?
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. 2
Answer:
b. 300
Question:
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. 13
, Question:
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. 1.94
Question:
There was a very short quiz with ve questions. The following table shows the
number of
Answer:
s and the cumulative relative frequency for those scores in
Question:
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
