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NG_AL2_U_04_Day1_GR_MathIntro_SB_Surveys_Experiments_Studie
s_and_Reports.docx
3.2.2016
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INFORMATION RECEIVED FROM K12
(To be used for the video scripting.)
Learning Objective: (column M)
 Explain the differences between surveys, experiments, and observational studies.
 Determine whether a survey, an experiment, or an observational study would be the best way to gather data for a situation.
 Determine a reasonable way to collect a random sample for a specified survey.
 Determine a reasonable way to randomly assign subjects to groups in an experiment.
 Explain why randomization may not apply to an observational study.
 Evaluate reports based on data.
Prerequisite Skills: (column R)
Not available.
Idea Outline from K12: (column S)
Sometimes voters are asked to vote on an issue and the question is written in a way that makes it hard to know what a yes vote
really means. [For example: "Shall that portion of 2013 Wisconsin Act 14 which limits the compensation of members of the board of
supervisors of Milwaukee County other than the chairperson of the board and chairperson of the finance committee to receipt of an
annual salary of not more than the annual per capita income of this county, which in 2012 was $24,051, and which limits the
compensation of the chairperson of the board to not more than 150 percent of that amount and the chairperson of the finance
committee to not more than 125 percent of that amount, subject to limitations and adjustments specified by law, and which
prohibits supervisors from receiving any compensation or benefits not specifically authorized or required by law become effective in
this county on April 18, 2016?"—Milwaukee County Board, 2014] Voters may skip the question altogether, or vote no, thinking no is
“safer” than yes.
Book Reference: (column P)
http://k12.kitaboo.com/eBookWs/ebook/maths/maths21/#
Page 75 for part about evaluating reports
STORYBOARD SCRIPT
Approx video length: 60 seconds
Word Count: 251
Topic: Surveys, Experiments, Studies, and Reports
Video Format: Hosted
Video Type: Concept
Target Audience: Grades 9 – 11
Audio
Number
Narration
OST
Design Notes
NG_AL2
_U_04_
Day1_G
R_MathI
ntro_01.
mp3
Hi! I’m Jenna.
" Surveys and Polls: Biased and Unbiased Show the title on screen. Highlight the text.
Results "
1. Show Jenna (actor: Patricia) in bedroom.
NG_AL2
_U_04_
Data is often collected by
I’ve been following the election polls,
and some poll questions are
confusing. I wonder if that’s done on
purpose.
VO changes to that of an adult female.
Day1_G
R_MathI
ntro_02.
mp3
experimentation or survey, but we
must be careful to ensure we’ve
collected good data. Randomness
helps us get a representative sample
of the population, but even with a
random sample, if a question is
biased, the survey results could be
worthless.
Sometimes survey questions or polls
are written to purposefully obtain a
certain result.
For example.
Wouldn’t you agree the legendary Joe
DiMaggio was a better baseball player
than Babe Ruth?
Is this question biased toward Yes,
biased toward No, or unbiased?
This question is biased toward Yes: It
asks you to agree with the statement,
and Joe DiMaggio is described as
“legendary,” which makes him appear
more favorably.
1. Show graphics of surveys, voting ballots,
etc. to fill screen during VO before poll
question is asked.
Survey
Wouldn’t you agree the legendary Joe
DiMaggio was a better baseball player
than Babe Ruth?

Biased toward Yes

Biased toward No

Unbiased
2. Show text of poll question.
3. Show answer choices in sync with VO.
4. Give a gap of 2 seconds and then highlight
“Biased toward Yes”
5. Highlight “Wouldn’t you agree” in poll
question.
6. Highlight “legendary” in poll question.
NG_AL2
_U_04_
Day1_G
R_MathI
ntro_03.
mp3
Let’s look at how questions can be
biased and compare three different
ways to ask a question.
Don’t you think it is time to change
the school song to sound more like
today’s music?
This question is biased toward a Yes
response.
Do you think we should change the
school song and break a long-standing
tradition?
This question is biased toward a No
response.
With which statement do you agree?

We should keep the school
song.

We should change the school
song.
This is an example of an unbiased
question.
Don’t you think it is time to change the
school song to sound more like today’s
music?
Biased toward a Yes response
Do you think we should change the
school song and break a long-standing
tradition?
Biased toward a No response
With which statement do you agree?

We should keep the school song.

We should change the school
song.
Unbiased
1. Show the three questions on screen and
scale at bottom of screen. Do not show blue
italicized text.
2. Fade out second and third question so that
focus is on the first question.
3. Show “Biased toward a Yes response” and
tip the scale so that the left side is lowered
toward YES.
4. Fade out first and third question so that
focus is on the second question.
5. Show “Biased toward a No response” and
tip the scale so that the right side is lowered
toward NO.
6. Fade out first and second question so that
focus is on the third question.
7. Show “Unbiased” and return the scale so
that both sides are at equal heights.
NG_AL2
_U_04_
Day1_G
R_MathI
ntro_04.
mp3
Now I see how the wording of a
question could influence my answer.
I'll have to be on the lookout for bias
from now on.
1. Show Jenna.