Exam 1 Answers
Question 1 of 20
5.0/ 5.0 Points
Convert 13% to decimal form.
A. 0.013
B. 0.13
C. 1.3
D. 13
Question 2 of 20
5.0/ 5.0 Points
The results of a poll are stated as follows: “Based on a survey of 156 randomly selected students, 90% of
the student body of 2870 students agree that no student should have to take final exams in two
consecutive exam periods”. If 2578 students actually agree, then what is the absolute error in the
reported result?
A. 5 students
B. 287 students
C. 0.17%
D. 292 students
Question 3 of 20
5.0/ 5.0 Points
Suppose that the cost of a statistics text was $50 in 1985 and is $100 in 2000. What is the ‘Statistics Text
Index’ number, rounded to the nearest tenth, for the 2000 edition with the 1985 price as the reference
value?
A. 20.0
B. 200.0
C. 50.0
D. 2.0
, Question 4 of 20
5.0/ 5.0 Points
A student wanted to know the favorite lunch at a large high school with a closed campus. What is the
first step in conducting a statistical study to answer the question?
A. Select a random sample of students.
B. State the goal of the study precisely.
C. Select a random sample of students and teachers.
D. Select a random sample of teachers.
Question 5 of 20
0.0/ 5.0 Points
The size of an e-mail file is stated as 210 kB, but the file size is actually 220.5 kB. What is the absolute
error?
A. 5%
B. 10%
C. 10.5 kB
D. -10.5 kB
Question 6 of 20
0.0/ 5.0 Points
A college student who does laundry infrequently wants to determine the effect of bluing on what should
be white clothes. Select the sample most representative of the population.
A. Reports of two friends, one of whom was given bluing
B. The reports of an internet chatroom on laundry techniques
C. Two loads of personal wash, one with, one without bluing
D.
Two loads of wash, one personal, one of a friend, the bluing assigned by
a coin flip
Question 1 of 20
5.0/ 5.0 Points
Convert 13% to decimal form.
A. 0.013
B. 0.13
C. 1.3
D. 13
Question 2 of 20
5.0/ 5.0 Points
The results of a poll are stated as follows: “Based on a survey of 156 randomly selected students, 90% of
the student body of 2870 students agree that no student should have to take final exams in two
consecutive exam periods”. If 2578 students actually agree, then what is the absolute error in the
reported result?
A. 5 students
B. 287 students
C. 0.17%
D. 292 students
Question 3 of 20
5.0/ 5.0 Points
Suppose that the cost of a statistics text was $50 in 1985 and is $100 in 2000. What is the ‘Statistics Text
Index’ number, rounded to the nearest tenth, for the 2000 edition with the 1985 price as the reference
value?
A. 20.0
B. 200.0
C. 50.0
D. 2.0
, Question 4 of 20
5.0/ 5.0 Points
A student wanted to know the favorite lunch at a large high school with a closed campus. What is the
first step in conducting a statistical study to answer the question?
A. Select a random sample of students.
B. State the goal of the study precisely.
C. Select a random sample of students and teachers.
D. Select a random sample of teachers.
Question 5 of 20
0.0/ 5.0 Points
The size of an e-mail file is stated as 210 kB, but the file size is actually 220.5 kB. What is the absolute
error?
A. 5%
B. 10%
C. 10.5 kB
D. -10.5 kB
Question 6 of 20
0.0/ 5.0 Points
A college student who does laundry infrequently wants to determine the effect of bluing on what should
be white clothes. Select the sample most representative of the population.
A. Reports of two friends, one of whom was given bluing
B. The reports of an internet chatroom on laundry techniques
C. Two loads of personal wash, one with, one without bluing
D.
Two loads of wash, one personal, one of a friend, the bluing assigned by
a coin flip
