Data
Study that involves the collection, organization, description, analysis, and interpretation of data
Statistics
Variables that are typically integers representing a count of objects or abstract amounts
Discrete (variables)
Type of sample that involves a newspaper, online website, or standing at the exit of the lunchroom
Convenience sample
A survey asks a political question that attempts to sway people's opinion while reading. Name the type of bias present in this survey.
Questionnaire/interviewer bias
At what college did Mr. Bradfield earn his first college degree?
University of Texas at Austin (Hook 'em, Horns!)
Data in its original form
Raw Data
The type of variables used in a Likert scale
Ordinal (variables)
Type of sample that involves separating population into clusters and selecting random members from each cluster
Stratified random sample
Typical type of bias that occurs in an internet survey
Voluntary response bias
Will John ever get a chromebook to use during class?
Well...yes...I will let him use mine while in class!
Give an example of raw data from our data collection from the first day of school
Pieces of paper with information on it turned in by everyone
Type of data representing year of birth (correct for our class)
Discrete
The type of sample that is the ideal, where each member of the population has an equal likelihood of being selected
Simple random sample
A survey is given to 20 seniors assigned to fill out a survey, but only 15 fill it out. Name the type of bias present.
Nonresponse bias
What was the first step related to your college applications that I said you should be thinking about right now?
Your recommendation letters. Start talking to teachers and coaches NOW!
Name a way raw data can be transformed into a statistic
Counting, ordering, or finding the average
Explain the difference between nominal and ordinal data
Nominal data cannot be ordered in a linear way, ordinal data can be ordered in a obvious, linear way
You survey 50 seniors asking about what theme they'd like for prom this year. Explain the difference between parameter of interest and statistic with this example.
Parameter of interest = proportion of whole senior population that want a particular theme
Statistic = proportion of sample of 50 seniors who want a particular theme
A survey is given to a sample asking what about their favorite type of music, but the options don't include some types of music or an 'other' category. Name the type of bias present.
Instrument bias
How old is Mr. Bradfield (in years)?
37
An attempt to make a prediction based on the data we collect and analyze
Inference
Both ordinal and discrete data can be ordered with numbers. Name the difference between these two types of data
The natural variation from sample to sample that happens by chance
Sampling error
A random survey of seniors attending a Brennan athletic event is done during the game. Everyone requested responds. The surveyor wants to make a claim about the entire Brennan senior class. Name the type of bias present.
Over-representation bias (of seniors who attend athletic events).
How many students were in Mr. Bradfield's class last year?
4 (Juels, Max, Maya, and Rozzie!)