Page 400 - Math Smart - 7

The mean does not represent the scores well because the mean of
higher than every score except for one.
The median of the data set is .
68, 70, 72I74, 78, 112

T

The mean of the data set is

Mean Median Mode
In a data set that In a data set that The mode is usually not a
has no outliers, has outliers, the suitable representation of
the mean is the median is the central tendency.
most suitable most suitable
representation of representation of 41,45, 43, 42, 47, 46, 15, 49, 15
central tendency central tendency as In the data set above, the mode
because it is the is not a good average
the values of the value in the data because all of the other values
data set are used set. are much higher than the
to calculate the mode.
mean. The mode is usually used to
represent popularity or majority
sentiments.

6 Comparing distributions

A teacher recorded the scores of 10 pupils for their English and Maths tests.
The teacher wants to compare the overall performance of these pupils in
English and Maths. Should she use the range, mean, median or mode for this
comparison?

Subject Scores
Maths
79 79 76 76 74 79 81 79 77 80
English
67 74 ICQ 68 67 83 70 85 102 64
Work out the range, mean, median and mode for the scores of each test. Fill
in the table below.

Subject Mean Mode Median Range
Maths
English
What does the average or spread tell the teacher about the scores in the
English and Maths tests?

396 UNIT 17
Data Handling
m