Measures of Centre
Measurements of Spread
Stem and leaf plots
Histograms and frequency tables
Mystery Questions
100
Calculate the mode:
3, -7, 2, 3, -2, -3, 4
3
100
Calculate the range:
-2, -5, 6, -1, 3
11
100
Calculate the mode:
21 minutes
100
What is the modal age?
20
100
Which of these animals can hold their breath longer: dolphins, humans, sloths or beavers?
Sloths
200
Calculate the median:
7, 2, 3, 8, 5, 9, 8
7
200
Calculate the range:
25 cm
200
Calculate the range:
4.3
200
How many people scored less than 3:
7
200
How many noses does a slug have?
Four
300
Calculate the mean, without a calculator:
44.3 %
300
Calculate the range:
1/2, -2/3, 5/8, -4/5, 1/4
57/40 = 1.425
300
Calculate the median for city drivers:
9mm
300
Calculate the mean number of goals scored:
1.7
300
The unicorn is the national animal of which country?
Scotland
400
Calculate the median, excluding the outlier:
1.3, 1.1, 1.0, -1.7, 1.5, 10, -1.1, 1.5, -0.9
1.05
400
Four integers are chosen so that their mean is 10.
The integers are all different.
What is the smallest possible range that the 4 integers could have?
4
400
Separately describe the skew of Ms Ship and Mr Chops classes.
Symmetrical & Right Skewed
400
What percentage of books have more than 300 pages?
60%
400
What was the first fruit eaten on the moon?
A peach
500
Calculate the lower quartile (Q1):
25%, -5/8, -0.35, 2/3, 0.75, -7/9, 87.5%, 3/5
0.4875 = 39/80
500
The Interquartile Range (IQR) is the upper quartile (Q3) subtract the lower quartile (Q1).
What is the IQR of the following list:
0.3, 7.3, -1.5, 0.6, -4.2, 3.6
5.1
500
A new value is added to the stem and leaf plot below and the new median is 25. What number was added?
26
500
Lauren plays 30 football matches.
The median number of goals Lauren scored is 1.5
Work out the values of x and y.
x = 9
y = 13
500
Which country hosts a "Wife-Carrying World Championship"?
Finland