NAME
11-1
DATE
PERIOD
Practice
Designing a Study
Determine whether each situation calls for a survey, an experiment, or an
observational study. Explain your reasoning.
1. You want to compare the health of
students who walk to school to the health
of students who ride the bus.
2. You want to find out if people who eat a
candy bar immediately before a math
test get higher scores than people who do
not.
Observational study; the health of
students who walk to school and
who ride the bus will be observed
and compared without them being
affected by the study.
Experiment; a group of students
will need to eat a candy bar before
a math test, which means that
members of the sample will be
affected by the study.
Determine whether each survey question is biased or unbiased. If biased, explain
your reasoning.
3. What is your current age?
4. Do you think teachers should be required
to attend all home and away football
games?
unbiased
Biased; the question
addresses more than one
issue but allows for only
one answer.
Biased; the question
encourages student
to respond yes.
Biased; the question is
confusing because it
introduces a double-negative.
7. A research group wants to conduct an experiment to test the claim that student who
use laptops in class have higher standardized test scores. State the objective of the
experiment, suggest a population, determine the experimental and control groups,
and describe a sample procedure.
Objective: to determine whether a student who uses a laptop in class has
higher standardized test scores than a student who does not use a
laptop in class; population: all high school students; experimental group:
class of 25 students given laptops to use in class; control group: class of
25 students who do not have access to laptops in class ; sample
procedure: Randomly select the 25 high school students of the same
grade level for each group. At the end of the school year, give each class
the same standardized test and compare the results.
Chapter 11
8
Glencoe Algebra 2
Copyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc.
6. Most teenagers text message during
class. Are you one of them?
5. Do you agree or disagree with the
following statement?
Teachers should not be required to not
supervise students during lunch.