Data Handling

Question 1

Venn Diagrams

Answer 1

Overlap goes in the middle, things that don’t fit on the outside, others in their respective parts of the chart.

Question 2

A∪B

Answer 2

Union - In A or B

Question 3

A∩B

Answer 3

Intersection - In both A and B

Question 4

ξ

Answer 4

Universal Set - Everything in the chart rectangle

Question 5

A’

Answer 5

Complement of set… - Everything that isn’t in set A

Question 6

Mode from a Frequency Table

Answer 6

Category with the highest Frequency

Question 7

Range from a Frequency Table

Answer 7

Highest category with a Frequencygreater than 0 and lowest

Question 8

Mean from a Frequency Table

Answer 8

First column (x) multiplied by the second column (f)

Divided by the total frequency fx/Σf

Question 9

Median from a Frequency Table

Answer 9

(Σf+1)÷2 is the position of the median

Question 10

Modal Class

Answer 10

Class with the highest frequency

Question 11

Median from a Grouped Frequency Table

Answer 11

(Σf+1)÷2 is the position, finding which class it is in

Question 12

Mean from a Grouped Frequency Table

Answer 12

Find Midpoint of each class

Σ(Frequency x midpoint) ÷ Σ Frequency

Question 13

Range from a Grouped Frequency Table

Answer 13

Difference between the highest and lowest class value

Question 14

Pie charts

Answer 14

Total of everything = 360°

(Amount÷total) x 360

Question 15

Box Plots

Answer 15

Lower Quartile shows 25%
Median Shows 50%
Upper Quartile shows 75%

Minimum Value is lowest whisker
Maximum value is highest whisker

Question 16

Cumulative Frequency

Answer 16

Median is halfway up y axis
Upper Quartile is 3/4 up
Lower Quartile is 1/4 up

Should line up with an accompanying box plot

Question 17

Histograms

Answer 17

Frequency density on y axis = frequency ÷ class width

Each class should be a different width