Modual 12

Question 1

What is the median?

Answer 1

the middle value once all of the numbers have been put in order

Question 2

What is the mean?

Answer 2

how many numbers there are

Question 3

What is the range?

Answer 3

biggest number - smallest number

Question 4

How do you find the lower quartile? e.g. 60

Answer 4

you half the median

e.g. 30

Question 5

How do you plot the lower/upper/median quartile on a cumulative graph?

Answer 5

you go the the y-axis and plot the lower/upper/median quartile number, move along (drawing a straight line) until you get to the cumulative frequency curved line, than you go down and meet the x-axis

Question 6

How do you find the upper quartile? e.g. 60

Answer 6

half the median and than added onto the median

e.g. 30 + 60 = 90

Question 7

What are the three steps of a stem and leaf diagram?

Answer 7

1 - put the date in order
2 - make a key for the diagram
3 - draw the diagram

Question 8

What does cumulative frequency mean?

Answer 8

adding it up as you go along

Question 9

Find the cumulative frequency for this graph:

Height = 141-150 151-160 161-170
F = 4 9 20

Answer 9

CF = 4 13 33

Question 10

How do you calculate the interquartile range?

Answer 10

upper quartile - lower quartile

Question 11

How do you put the cumulative frequency curve onto the graph?

Answer 11

put it through all of the points plotted on the graph in a curve line

Question 12

How many downward lines are there in a box plot and what are there uses?

Answer 12

5

1st - smallest number of the data
2nd - lower quartile 
3rd - median
4th - upper quartile
5th - largest number of the data

Question 13

What would the different numbers is the box plot be if you were given the data: 4, 12, 13, 17, 18, 20, 22, 24, 25, 30, 34

Answer 13

4, 13, 20, 25, 34

Question 14

What is the mode?

Answer 14

the most common number