First Statistics Test

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1

What is descriptive statistics?

presents information from a data set in a convenient form

2

What is inferential statistics?

makes generalizations from sample data

3

What is a parameter?

describes the population

4

What is a statistic?

only describes the sample of the population

5

What is quantative data?

numbers

6

What is qualative data?

not numbers; days of the week or political parties

7

What is a simple random sample?

each sample of same size has an equal probability of being picked

8

What is a systematic sample?

starting point selected and then every ___th is picked from the population

9

What is cluster sample?

population divided into groups called clusters; randomly select from those clusters

10

What is a stratified sample?

dividing population into two+ groups that have same characteristics; pick simple random from those groups

11

What is a random sample?

using chance to select people from population

12

How do you find relative frequency?

rf = f / total

13

How do you find Ex?

add sample up

14

How do you find Ex2?

square each sample then add them up

15

How do you find (Ex)2

square Ex lol

16

What does E mean?

sum

17

What does x mean?

sample mean

18

What does u mean?

population mean

19

How do you find someone's grade point average?

multiple the grade value times hour. then add up that answers to divide with the total number of hours.

20

What is Chebyshev's rule look like?

not mound shaped