General
Fun Question!
Why did the student get upset when the teacher called her average?
It was a 'mean' thing to say
Fun Question!
What is a math teacher's favorite animal?
A Pi-thon!
Fun Question!
Why can't a nose be 12 inches long?
Because then it would be a foot!
Fun Question!
What shape do you always have to be careful of?
A trap-ezoid!
Fun Question!
What's a math teacher's favorite season?
SUMmer
What is descriptive statistics?
Describes a current situation
What's an advantage of an observational study over an experimental study?
Observational studies are in a more natural setting
What are the three survey methods?
Mailed questionnaire, phone interview, and in person interview
Describe random sampling
assigning random numbers and selecting randomly, such as from a hat or table
What are any/all misuses of statistics in the following statement?
5 out of 6 the creston teachers agree that students have been acting like toddlers this week
"5 out of 6" = suspect samples
What is inferential statistics?
Makes a prediction about the future
What's an advantage of an experimental study over an observational study?
More control over independent variable and confounding variables
What's an advantage and disadvantage of mailed questionnaires?
Advantage: Cheap
Disadvantage: Low responses
Answers may vary
What is cluster sampling?
Dividing the population into intact groups (clusters) and selecting whole groups as parts of the sample
What level of measurement is used?
Phone battery percentages
Ratio
zero means no battery or no charge
What is statistics?
Collecting and analyzing data to draw conclusions and in some cases make predictions
Answers may vary- need to show understanding
What's a disadvantage of an observational study compared to an experimental study?
less control
What's an advantage and disadvantage of phone interviews?
Advantage: Relatively cheap
Disadvantage: People don't answer
Answers may vary
What is Systematic sampling?
Selecting every kth number after starting on a random number (like testing every 15th table for defects)
What level of measurement is used?
Class rankings (ex valedictorian, salutatorian, etc.)
Ordinal
What's the difference between a sample and a population?
Population is the group being studied and the sample is a group from the population that data is gathered from
What's a disadvantage of an experimental study compared to an observational study?
Not as accurate in a natural setting
What's an advantage and disadvantage of in person interviews?
Advantage: In-depth responses
Disadvantage: Very expensive
Answers may vary
What is Stratified sampling
Dividing the population into groups (strata) based on qualities and selecting the sample by taking some from each group
What are any/all misuses of statistics in the following statement?
This weightloss program may help you lose weight 10 times faster!
"may help" = implied connections
"10 times faster" = detached statistics