Introduction

Question 1

Simpson’s Paradox

Answer 1

Aggregated data may have different outcome than when split up

Question 2

Objective of statistics

Answer 2

Make an inference about a population based on information in a sample

Question 3

Population

Answer 3

set of units (people, objects, or events)

Question 4

Sample

Answer 4

subset of the units of a population

Question 5

Quantitative data

Answer 5

numerical

Question 6

Qualitative data

Answer 6

descriptive

Question 7

ordinal data

Answer 7

values are ordered

Question 8

nominal data

Answer 8

no particular order

Question 9

Presenting nominal and ordinal data

Answer 9

frequency table

Question 10

Proportion

Answer 10

of interest / total #

Question 11

ratio

Answer 11

number of interest / number not of interest

Question 12

Pie chart useful for

Answer 12

relative proportions

Question 13

sample mean

Answer 13

arithmetic mean

Question 14

geometric mean

Answer 14

nth root of product
3root of (1 x 2 x 3 )
used when data on log scale

Question 15

IQR

Answer 15

Q3 - Q1

Question 16

Q1

Answer 16

1/4 * (n+1)

Question 17

Q2

Answer 17

2/4*(n+1)

Question 18

Q3

Answer 18

3/4*(n+1)

Question 19

standard deviation

Answer 19

difference of each value from the mean. Then square it. Then add. divide by n-1. then sqroot

Question 20

variance

Answer 20

standard deviation squared