Vocab

Question 1

What is Statistics?

Answer 1

The study of variability

Question 2

What is variability?

Answer 2

Differences…how things differ. There is variability everywhere… We all look different act different have different presences statisticians look at these differences.

Question 3

What are two branches of AP STATS

Answer 3

Inferential and Descriptive

Question 4

What are Descriptive STATS?

Answer 4

Tell me what you got! Describe to me the data that you collected use pictures or summaries like mean median range etc

Question 5

What are inferential STATS?

Answer 5

Look at your data and use that to say stuff about the big picture. Like tasting soup a little sample can tell you a lot about the big pot of soup(population)

Question 6

Compare Descriptive and inferential STATS

Answer 6

Descriptive explains you about the data that you have inference uses that data you have to try to say something about an entire population

Question 7

What is data?

Answer 7

Any collected information. Generally each little measurement like if it is a survey about liking porridge the data might be yes yes no yes yes if it is the number of saltines someone can eat in 30 secs the data may be 3 1 2 1 4 3 3 4

Question 8

What is a population?

Answer 8

The group you’re interested in.

Question 9

What is a sample

Answer 9

A subset population often to make inferences about the population. We calculate statistics from samples

Question 10

Compare population to sample

Answer 10

Populations are generally large and samples are small subsets of the population

Question 11

Data to Statistics

Answer 11

Data is each little bit of info collected from the subjects we 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 population then that mean is called a parameter

Question 12

Parameter

Answer 12

A numerical summary of a population like a mean median range of a population

Question 13

Statistic

Answer 13

A numerical summary of a sample like a mean median range of a sample

Question 14

Data-Statistic-Parameter categorical example

Answer 14

Data are individual measures like meal preference taco taco pasta taco burger burger taco statistics and parameter are summaries. A statistic would be 42% of sample preferred tacos and a parameter would be 42% of population preferred tacos.

Question 15

D-S-P quantitative example

Answer 15

Data are individual measures like how long a person can hold their breath 45 sec 64 sec 32 sec 68 sec. That is the raw data. Statistics and parameters are summaries like the average breath holding time in the sample was 52.4 seconds and a parameter would be the average breath holding time in the population was 52.4 seconds

Question 16

Census

Answer 16

Like sample of the entire population you get information from every member of the population

Question 17

Does a census make sense

Answer 17

A census is ok for small populations (like me nystroms students) but impossible if you want to survey all US teens.

Question 18

Parameter vs Statistic

Answer 18

Both are single number summarizing a larger group of numbers but pppp parameters come from pppp populations sss statistics come from ssss statistics

Question 19

Sample vs census

Answer 19

Sample from small population census from entire population

Question 20

Random variables

Answer 20

If you randomly choose people from a list then their hair color height weight and any other data collected can be considered random variables

Question 21

Quantities vs Categorical variables

Answer 21

Quantities numerical measures categorical are categories like eye color

Question 22

Quantitative variable

Answer 22

Numerical height age number of cars sold

Question 23

Categorical variable

Answer 23

Like categories blonde female yes no etc

Question 24

Categorical is also called

Answer 24

Qualitative

Question 25

Frequency

Answer 25

How often something goes up

Question 26

Mode

Answer 26

Most common

Question 27

Median

Answer 27

Middle number

Question 28

Mean

Answer 28

Average

Question 29

Who chases the tail

Answer 29

The mean