Transcript Finding Sales Tax

Analyzing Statistical Results
Lesson 3-8
Pg. # 108-110
CA Content Standards
Statistics, Data Analysis, and Probability 2.3***:
I can analyze data and explain why the way in which
the question was asked might have influenced the
results obtained.
Statistics, Data Analysis, and Probability 2.4***:
I can identify claims based on statistical data and, in
simple cases, evaluate the validity of the claims.
Vocabulary: NEUTRAL
Not aligned with, supporting, or favoring
either side
Unbiased
Objective
Evaluate the effect of questions on
statistical results.
Math Link: You know how sampling
techniques affect statistical results.
Now you will learn how wording of
questions affects these results.
The way questions are worded can
influence the results of the survey.
NOT FAIR: Are you in favor of students being
given the opportunity to use new athletic
equipment?
NOT FAIR: Do you think the school should spend
its limited funds on more athletic equipment?
FAIR: Do you support or oppose the purchase of
new school athletic equipment?
Question C is neutral and a fair question. It doesn’t
persuade someone to answer one way or the
other.
Select the question you think is
most fair.
Do you favor or oppose requiring drivers to pass a
basic driving test in order to renew their licenses?
Should drivers be forced to prove their driving
competence every time they need to renew their
licenses?
Are you in favor of ensuring that the drivers on your
roadways are skilled enough to drive?
Identify the claim made. Then tell
whether the claim is justified by
the statistics.
65% of 6th graders surveyed prefer pop
music to country music. Casey, a 6th
grader, probably prefers pop.
Claim: Casey probably prefers pop
music to country music; claim is justified
because more than 50% of 6th graders
prefer pop.
The Moral of the Story:
When analyzing statistical data, it is
important to determine how accurate
the findings are. To collect data that are
unbiased, or fair, questions should be
asked in a neutral way.