Frequency Distribution

Question 1

Bar Chart

Answer 1

• Frequency distribution when the data is categorical

- For ordinal data, it needs to be ordered in a way that makes sense

Question 2

Stem and Leaf

Answer 2

• Frequency distribution when data is quantitative

Question 3

Dot Plot (discrete) and Histogram

Answer 3

• Frequency distribution when data is quantitative
• Dot plot is not good with continuous numbers when you have decimal points
• used for discrete numbers only

Question 4

Grouping Data

Answer 4

• Condenses info and is usually done for continuous variables

Question 5

Boxplots

Answer 5

• Use Quartiles - in a ranked set of data values, these are the three points that divide the data set into four equal groups, each group comprising a quarter of the data

Question 6

Second Quartile (Q2)

Answer 6

the Median

Question 7

First Quartile (Q1)

Answer 7

• Median of data values in lower half

Question 8

Third Quartile (Q3)

Answer 8

• Median of data values in upper half

Question 9

Median

Answer 9

(n+1)/2

Question 10

Outliers

Answer 10

anything outside of 1.5 x IQR

Question 11

Inter Quartile Range (IQR)

Answer 11

Q3-Q1