MATH 221 Week 3 Quiz: Statistics for Decision-Making (v1) | TOP SCORE 100% GURANTEED
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Course
MATH 221
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DeVry University, Chicago
MATH 221 Week 3 Quiz: Statistics for Decision-Making (v1)
Question: A survey of 128 DeVry statistics students found that 83% read the announcements each week. What is the population and what is the sample?
Question: In asking all 359 second graders in a school district, it is found that on aver...
math 221 week 3 quiz statistics for decision making v1 | top score 100 guranteed
question co 1 the data that lists the temperature in albany
ny each day in the month of february would be class
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MATH 221
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Week 3 Quiz https://xlitemprod.pearsoncmg.com/api/v1/print/math
Instructor: Denise James
Student: _____________________
Course: Statistics for Decision Making Assignment: Week 3 Quiz
Date: _____________________
(100)
1. Determine whether the underlined value is a parameter or a statistic.
The average score for a class of 28 students taking a calculus midterm exam was 72%.
Is the value a parameter or a statistic?
Statistic
Parameter
2. Determine whether the given value is a statistic or a parameter.
In a study of all 1115 seniors at a college, it is found that 50% own a vehicle.
Choose the correct statement below.
Statistic because the value is a numerical measurement describing a characteristic of a sample.
Statistic because the value is a numerical measurement describing a characteristic of a
population.
Parameter because the value is a numerical measurement describing a characteristic of a
sample.
Parameter because the value is a numerical measurement describing a characteristic of a
population.
3. Determine whether the statement is true or false. If it is false, rewrite it as a true statement.
More types of calculations can be performed with data at the nominal level than with data at the interval level.
Choose the correct answer below.
A. False. More types of calculations can be performed with data at the interval level than with
data at the nominal level.
B. True.
C. False. The same types of calculations can be performed with data at the nominal level and
with data at the interval level.
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, Week 3 Quiz https://xlitemprod.pearsoncmg.com/api/v1/print/math
4. What is an inherent zero? Describe three examples of data sets that have inherent zeros and three that do not.
Choose the correct answer below.
A. An inherent zero is a zero that implies none.
B. An inherent zero is a zero that occurs in the data set naturally.
C. An inherent zero is a value that the variable can take.
Select three examples of data sets that have inherent zeros below.
A. Average IQ score of a high school class
B. Average monthly percipitation in inches
C. A student's level of happiness measured from 0 to 10
D. Average age of college students in years
E. Maximum wind speed during a hurricane
F. Temperature in degrees Fahrenheit
Select three examples of data sets that do not have inherent zeros below.
A. A student's level of happiness measured from 0 to 10
B. Average age of college students in years
C. Average IQ score of a high school class
D. Maximum wind speed during a hurricane
E. Temperature in degrees Fahrenheit
F. Average monthly percipitation in inches
5. Identify the sampling techniques used, and discuss potential sources of bias (if any). Explain. Assume the population of
interest is the student body at a university.
Questioning students as they leave an athletic facility, a researcher asks 349 students about their drinking habits.
What type of sampling is used?
A. Simple random sampling is used, because students are chosen at random.
B. Convenience sampling is used, because students are chosen due to convenience of location.
C. Systematic sampling is used, because students are selected from a list, with a fixed interval
between students on the list.
D. Stratified sampling is used, because students are divided into groups, and students are
chosen at random from these groups.
E. Cluster sampling is used, because students are divided into groups, groups are chosen at
random, and every student in one of those groups is sampled.
What potential sources of bias are present, if any? Select all that apply.
A. University students may not be representative of all people in their age group.
B. Because of the personal nature of the question, students may not answer honestly.
C. The sample only consists of members of the population that are easy to get. These members
may not be representative of the population.
D. There are no potential sources of bias.
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