Statistics vocab

Question 1

What’s statistics ?

Answer 1

Study of variability

Question 2

What’s a variability ?

Answer 2

Difference stuffs

Question 3

What’s are 2 branches of AP Stats

Answer 3

Inferential and Descriptive

Question 4

Compare Inferential and Descriptive stats

Answer 4

Descriptive explains you about the data you have/ Inferential uses the data you have to talk about a whole population

Question 5

What’s data ?

Answer 5

All gathered information

Question 6

What’s a population ?

Answer 6

The group that you interested in

Question 7

What’s a sample ?

Answer 7

a subset of the population

Question 8

Compare population to sample

Answer 8

Populations are large and samples are subsets of these populations.

Question 9

Compare data to statistic

Answer 9

Data is each little bit of information we gathered. /Finding the mean of the group of data, if it’s sample, then we call it a statistic.

Question 10

Compare data to parameter

Answer 10

Data is each little bit of information we gathered./ Finding the mean of the group of data, if it’s a population, then we call it a oarameter,

Question 11

What’s a parameter ?

Answer 11

A numerical summary of the population

Question 12

What’s a statistic ?

Answer 12

A numerical summary of the sample

Question 13

We are curious about the average
wait time at a Dunkin Donuts drive
through in your neighborhood. You
randomly sample cars one afternoon
and find 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?

Answer 13

• We will never know the parameter
• The statistic is 3.2
• The paramenter of interest is the same thing as parameter
• The data is the wait time of each individual car, so that would be like “3.8 min, 2.2
  min, .8 min, 3 min”.

Question 14

Compare DATA-STATISTIC -PARAMETER using categorical example

Answer 14

• Data are individual measure like meal such as (taco, taco, pizza, burger, pizza,…
• Statistics and Parameters are summaries. A statistic would
  be “42% of sample preferred tacos” and a parameter would be “42% of population preferred tacos.”

Question 15

Compare DATA-STATISTIC-PARAMETER using 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.”
• 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

What’s a census ?

Answer 16

A sample of the entire population. Get information from every member in the population

Question 17

Does a census make sense ?

Answer 17

A Census is ok for a small population

Question 18

What’s the difference between parameter and statistic ?

Answer 18

Both are a single number summerzing a larger group of numbers.
Parameter comes from population and statistic comes from statistics.

Question 19

What are Descriptive stats ?

Answer 19

Describe the data you gathered, picture,…

Question 20

What are Inferential stats ?

Answer 20

Use the data to tallk about stuff of the big picture, tasting the soup,….