Data
A course of 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 Mrs. Nosal earn her first college degree?
University of Illinois (Go, Illini!)
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
You survey 25 randomly selected students from each grade level at Davenport to ask them if they have noticed the Build The Pack effort this year on campus.
What type of sampling method is this?
Stratified Random Sample
Give an example of raw data from our Jelly Blubbers activity.
The length of the five Jelly Blubbers in each sample of five.
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 is a first step related to your college applications that 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 an 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 long has Mrs. Nosal been married?
35 years!
An attempt to make a prediction based on the data we collect and analyze
Inference
Both ordinal and discrete data can be ordered. Name the difference between these two types of data.
Discrete data represents objects that have been counted, ordinal data can be numbers that are just assigned and don't represent counts or it can be categories that have a natural order.
The natural variation from sample to sample that happens by chance
Sampling error
A random survey of seniors attending a Davenport athletic event is done during the game. Everyone requested responds. The surveyor wants to make a claim about the entire DHS senior class. Name the type of bias present.
Over-representation bias (of seniors who attend athletic events).
What was Mrs. Nosal's favorite sport in high school?
Horseback riding!