test #1

Question 1

Statistics is the study of ____ ____

Answer 1

decision making

Question 2

IQR is a measure of _____

Answer 2

spread

Question 3

IQR robust?

Answer 3

yes

Question 4

Sample Mean symbol is __

Answer 4

x̄

Question 5

Sample Mean is a measure of ____

Answer 5

location

Question 6

Sample Mean robust?

Answer 6

no

Question 7

Range Symbol is _

Answer 7

R

Question 8

Range is a measure of ____

Answer 8

Spread

Question 9

Range robust?

Answer 9

no

Question 10

Sample Varience symbol is __

Answer 10

s^2

Question 11

Sample Variance is a measure of ___

Answer 11

Spread

Question 12

Sample Variance robust?

Answer 12

No

Question 13

Minimum symbol is __

Answer 13

x subscript (1)

Question 14

Minimum robust?

Answer 14

Not Robust

Question 15

Stratified sample

Answer 15

break a population into homogeneous groups, take SRS sample from each group

Question 16

Systematic sample

Answer 16

sample every k^th individual

Question 17

Simple Random Sample (SRS)

Answer 17

every sample has same chance of selection

Question 18

parameter

Answer 18

numerical characteristic of a population

Question 19

Nominal level of measurement

Answer 19

qualitative data, no math can be done

Question 20

ordinal level of measurement

Answer 20

qualitative data, can be ranked but differences are redundant

Question 21

interval level of measurement

Answer 21

quantitative data, can be ranked, differences are meaningful, zero is not inherent

Question 22

ratio level of measurement

Answer 22

quantitative data, can be ranked, differences are meaningful, zero is inherent

Question 23

Median Formula when N is odd

Answer 23

(n+1)/2

Question 24

Median Formula when N is even

Answer 24

(n/2)th + ((n/2) +1)th all divided by 2 (basically comes out to sum of 2 middle nums divided by 2)

Question 25

IQR Method for Finding Outliers

Answer 25

Q1 - 1.5IQR Q3 + 1.5IQR