Summer Work Vocabulary

Question 1

Statistics

Answer 1

Study of variability

Question 2

Variability

Answer 2

How things vary and differ

Question 3

2 Branches of AP Stats

Answer 3

Inferential and descriptive

Question 4

Descriptive Stats

Answer 4

Describe data collected: pictures, or summaries

Question 5

Inferential Stats

Answer 5

Infer about data collected: Big picture and entire population

Question 6

Compare DS and IS

Answer 6

Descriptive describes data you have; inferential infers something about entire population

Question 7

Data

Answer 7

Collected information/ measurement

Question 8

Population

Answer 8

The group you’re interested in

Question 9

Sample

Answer 9

Subset of population

Question 10

Compare pop. to samp.

Answer 10

Populations are large; samples are subsets of population

Question 11

Compare data to stats.

Answer 11

Data is each piece of information collected; statistics are when we summarize a group of data

Question 12

Compare data to parameters

Answer 12

Data is each piece of info collected; parameters are numbers that summarize the entire population

Question 13

Parameters

Answer 13

Numerical summary of population

Question 14

Statistic

Answer 14

Numerical summary of a sample

Question 15

Compare Data-Statistic-Parameter using a categorical example

Answer 15

Data is individual measures; statistics and parameters are summaries
Meal preference:
Data- Taco, taco, pasta, burger, taco
Statistics- 42% of sample preferred tacos
Parameter- 42% of the population preferred tacos

Question 16

Compare Data-Statistic-Parameter using quantitative example

Answer 16

Data are individual measures; statistics and parameters are summaries
Holding Breath:
Data- 45 sec, 64 sec, 32 sec, 68 sec
Statistics- Average breath holding time in the sample is 52.4 sec
Parameter- Average breath holding time in the population is 52.4 sec

Question 17

Census

Answer 17

Sample of the entire population

Question 18

When do you use a census?

Answer 18

Small populations

Question 19

Difference between a parameter and as statistic

Answer 19

Parameters= Population
Statistics= Statistics

Question 20

Difference between a sample and a census

Answer 20

Sample is from small part of population; census is from entire population

Question 21

Random variables

Answer 21

Random data

Question 22

Quantitative Data

Answer 22

Numerical data

Question 23

Categorical Data

Answer 23

Descriptive data

Question 24

Frequency

Answer 24

Percent of time something occurs in data

Question 25

Data/Datum

Answer 25

Data is singular; datum is plural

Question 26

Frequency distribution

Answer 26

Table showing how often certain values occur in a data set

Question 27

Relative frequency

Answer 27

Percent of time something shows up

Question 28

Formula for relative frequency

Answer 28

Divide frequency by total

Question 29

Cumulative frequency

Answer 29

Adding frequencies

Question 30

Relative cumulative frequency

Answer 30

Adding up percentages

Question 31

Mean

Answer 31

Average of data

Question 32

Population mean vs sample mean

Answer 32

Mean of population is a parameter; mean of sample is a statisitc

Question 33

Median

Answer 33

Middlemost number

Question 34

Mode

Answer 34

Most common data in sample

Question 35

Where do we use mode?

Answer 35

With categorical variables