The lengths of a number of leaves are recorded in the table.
A box plot is to be drawn to represent the data.
In which interval is the median?
1 - 3cm
4 - 7cm
8 - 9cm
In which interval is the lower quartile Q1.
In which interval is the upper quartile Q3.
10 - 12cm
The table above shows the ages of children in the first class carriage on a train from Glasgow to London.Using this table, find the median age.
4 - 7 years
8 - 11 years
12 - 15 years
The table above shows the ages of children in the first class carriage on a train from Glasgow to London.Use the table to find the lower quartile Q1.
The table above shows the ages of children in the first class carriage on a train from Glasgow to London.Use the table to find the upper quartile Q3.
16 - 19 years
From the box plot, find the value of the upper quartile.
30
45
60
Calculate the interquartile range for the data below:
1, 5, 7, 8, 11, 14, 17, 17, 25
7
12
11
Calculate the semi-interquartile range for the data below:
6,7,9,10,11,13,14
6
3
2
From the data below, calculate the mean value:
30, 35, 45, 50, 55, 65, 70
40
50
Using the same data as in the previous question, calculate the standard deviation:
13.6
216.7
14.7