Summer Vocab Flashcards
What is statistics
The study of variability
What is variability
Differences… How things different. There is variability everywhere. We all look different, act different, have different presences
What are the two branches of AP stats
Inferential and descriptive
What are descriptive stats
Tell me what you got! Describe to me the data that you collected pictures or summaries like the mean median or range
What are inferential stats look at
Look at your data and use that to say stuffAbout the big picture… Like tasting soup… A little sample can tell you a lot about the big picture of soup (the population)
Compare descriptive and inferential stats
Descriptive explains you about the data that you have, and inferential uses the data you have to try and say something about an entire population
What is data
Any collected information. Generally each little measurement… Like if it is a survey about liking porridge… The data mighty yes yes no yes yes if it is the number of saltine someone can eat in 30 seconds, the data might be 12314334
What is population
The group you’re interested in. Sometimes it’s big, like all teenagers in the US or other times it’s small like all AP students in my school
What is a sample
A subset of a population, often taken to make it princes about the population we calculate statistics from samples
Compare population to sample
Populations are generally large, and samples are small subset of the population. We take samples to make it princes about populations will you statistics to estimate parameters
Compare data to statistics
That it is each little bit of information collected from the subjects… They are the individual little things we collect… We summarize them by, for example, finding the meaning of a group of data. If it is a sample then we called that mean a statistic if we have data from each member of a population in that mean is called a parameter
Compare data to parameters
Dad it is each little bit of information collected from the subjects… They are the individual little things we collect… Summarize them by for example finding the mean of a group of data. If it is a sample then we call that mean a statistic if we have data from each member of the population in that mean is called a parameter
What is a parameter
Numerical summary of a population like a mean, median, range of a population
What is a statistic
Numerical summary of a sample. Like a mean, median, range of a sample
We are curious about the average wait time at a Dunkin’ Donuts drive-through in your neighborhood. You randomly sample car is one afternoon by the average wait time is 3.2 minutes. What is the population parameter? What is the statistic? What is the parameter of interest? What is the data?
The parameter is the true average wait time at that Dunkin’ Donuts. It is a number you don’t have and we’ll never know. The statistic is 3.2 minutes it is the average of the data you collected. The parameter of interest is the same thing as the population parameter. In this case it is the true average wait time of all cars. The data is the wait time of each individual car, so that would be like 3.8 minutes 2.2 minutes .8 minutes three minutes you take that data and find the average, the average is called a statistic, any use that to make an inference about the true parameter
