template by bill arcuri, wcsd click once to begin jeopardy! data management style!
TRANSCRIPT
Template byBill Arcuri, WCSD
Click Once to BeginJEOPARDY!Data Management Style!
Template byBill Arcuri, WCSD
JEOPARDY!
100 100 100 100
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400 400 400 400
500 500 500 500
Define Me! Data TypesName that Technique
What Bias?
Template byBill Arcuri, WCSD
FINAL JEOPARDY
Reducing Bias
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A highway engineer suggests that an economical way to survey traffic
speeds on an expressway would be to have the police officers that patrol the highway record the speed of the traffic
around them every half hour.
1. Identify and describe the type of bias.2. What would be a possible solution to avoid this bias?
Template byBill Arcuri, WCSD
1. Household Bias – Police cars present will affect how people drive and thus will underrepresent the population of traffic speed.
2. Systematic Random Sample using speed cameras, or unmarked cars throughout the day.
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Population
a group of individuals that is the focus of a study
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Sample
a selection of individuals taken from a population
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Longitudinal Study
a study that considers individuals over a long period of time
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Cross-sectional Study
a study that considers individuals from different groups at the same time
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Inference
a conclusion about the population that is made from the sample
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Telephone NumberQualitative or
Quantitative variable?
Qualitative
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TemperatureQualitative or
Quantitative variable?
Quantitative
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The amount of time it takes for a light bulb
to burn out. Discrete or continuous?
Continuous
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The number of times it takes a person to pass their MCATs.
Discrete or continuous data?
Discrete
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The production of tomatoes by weight. Discrete or continuous
data?
Continuous
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From the Customer Sales Event, Toyota randomly
draws 5 ballots from a jar of contestants to win the
new 2013 Camry.
Simple Random Sampling
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You want to know which breakfast items students
prefer at St. Benedict for an upcoming event. You
decide to sample 10% of students from each grade.
Stratified Random Sampling
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Mr. Borba is worried his students found the test too difficult. He
wants to know how his students felt about the test, so he
organizes the students’ names in alphabetical order and chooses
every 3rd name to answer a questionnaire.
Systematic Random Sampling
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Miss Harbison needs a new cell phone but doesn’t know which brand to choose. Her contacts are organized on her phone by last name and she chooses to
ask all her friends with last names beginning with D, F, M, P,
T, and V.
Cluster Random Sampling
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Bart Simpson manufactures firecrackers and wants to test some of them. Out of the 1000
firecrackers produced, he chooses 50 firecrackers to test
and records if they work.
Destructive Random Sampling
Daily Double!!!
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University of Waterloo sends out surveys to their students
via email. Most students delete these emails before
even opening it.
Non-response Bias
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As part of a survey of the “Greatest Hits of 2012”, a
radio station asks its listeners:
Which was the best song by Adele?A. Set Fire to the RainB. Rolling in the DeepC. Someone Like YouD. Other:
Response Bias
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A survey asks students at a high school football game
whether a fund for extracurricular activities should be used to buy new equipment
for the football team or instruments for the school band.
Sampling Bias
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The government of Ontario is conducting a study to find
out how many families regularly recycle. They
decide to collect data from 500 families in each city.
Household Bias
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An aid agency in a Kenya wants to know what proportion of households has at least one
personal computer. They conduct a survey by calling
households randomly selected from the telephone directory.
Sampling Bias
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Answer 5-100
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Answer 5-200
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Answer 5-300
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Answer 5-400
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Answer 5-500
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Answer 6-100
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Answer 6-200
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Answer 6-300
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Answer 6-400
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Answer 6-500