Key Terms
__________ is the study of collecting, analyzing, and interpreting data.
statistics
A ____________ is a method of collecting data that by asking questions.
survey
When we sampled yellow and purple blocks, we were doing what kind of sampling?
random
How tall is Mathias?
6 foot 2 inches
A _____________ includes all members of a group being studied.
population
______________ sampling ensures every member of a population has an equal chance of being selected.
Random
Did the results of the random sampling of purple and yellow blocks accurately represent the total population?
no!
How many kids does Mrs. McCall have?
2
A _____________ is a smaller part of a population used to make predictions.
sample
An ______________ is a conclusion made after data is collected.
inference
If different samples lead to very different inferences, the sampling method may not be_____________.
valid
Who is your favorite teacher?
Mrs. McCall!!
A _________________ sample accurately reflects the characteristics of the whole population.
representative
The __________ of a sample means the results can be trusted and used to make inferences about a population.
validity
Find the MODE of this sample data:
6, 6, 7, 6, 8, 7, 7, 7, 6, 6, 8
6
Mrs. McCall is the best 7th grade math teacher you have ever had on your schedule. Bias or Fair?
Fair! I am the only 7th grade math teacher you have!
________ poccurs when a sample does not accurately represent the population.
___________ samples help avoid __________.
Random; bias
Find the MEDIAN of this sample data:
6, 6, 7, 8, 9, 9, 10, 11, 12
9
On a scale of 0 - 10, how comfortable are you with statistics?
fair!!