Exam (elaborations) MATH 302 MIDTERM EXAM (MATH302)

MATH 302
MIDTERM EXAM


Part 1 of 9 -

Question 1 of 25 1.0/ 1.0 Points
Gender and State are examples of which type of data?


A.Ordinal data
B.Discrete data
C.Categorical data
D.Continuous data


Answer Key: C


Part 2 of 9 - 2.0/ 2.0 Points

Question 2 of 25 1.0/ 1.0 Points
What type of probability uses sample spaces to determine the numerical probability that an
event will occur?


A.classical probability
B.subjective probability
C.empirical probability
D.conditional probability


Answer Key: A


Question 3 of 25 1.0/ 1.0 Points
The formal way to revise probabilities based on new information is to use:


A.conditional probabilities
B.complementary probabilities
C.unilateral probabilities

, D.common sense probabilities


Answer Key: A


Part 3 of 9 - 3.0/ 3.0 Points

Question 4 of 25 1.0/ 1.0 Points
The following data were obtained from a survey of college students. The variable X represents the number of non-
assigned books read during the past six months.
x 0 1 2 3 4 5
P (X=x) 0.20 0.25 0.20 0.15 0.10 0.10

Find P( X 3)


A.0.20
B.0.15
C.0.85
D.0.80


Answer Key: D


Question 5 of 25 1.0/ 1.0 Points
A researcher surveyed college students to study their opinion about the proposed change in
smoking rules. The researcher asked a group of 30 students: 12 of them supported the change,
13 of them did not, and 5 had no opinion. This is not a binomial model because...


A....less than half of the students supported the change.
B. . .there are 3 possible outcomes, not 2.
C.30 students are not enough for a good sample
D....the students who strongly supported the change and those who only mildly
supported the change are counted the same.


Answer Key: B