Starter quiz
The dot plot represents a set of data. The mode for this data is ______.- '2' ✓
- The dot plot represents a set of data. The median for this data is ______.
- '3' ✓
- The dot plot represents a set of data. The mean for this data is ______
- '5' ✓
- The dot plot represents a set of data. The range for this data is ______
- '8' ✓
- Select all of the measures that are types of averages.
- mean ✓
- median ✓
- mode ✓
- range
- total
-
- Two classes of pupils sit a test. The range of scores in Class A is 22; the range in scores for Class B is 35. Which conclusion is valid for this statistical summary?
- The scores in Class A tended to be higher than the scores in Class B.
- The scores in Class A tended to be lower than the scores in Class B.
- The scores in Class A tended to be more consistent than the scores in Class B. ✓
- The scores in Class A tended to be less consistent than the scores in Class B.
-
Exit quiz
- The central tendency of a dataset can be described by using an ______, such as the mean, median or mode.
- 'average' ✓
- The spread of a dataset can be described by using the ______.
- mean
- median
- mode
- range ✓
-
The table shows summary statistics about how many points each person scored during a series of hockey games. The mode suggests that ______ tended to score the highest each game.- 'Sofia' ✓
- The table shows summary statistics about how many points each person scored during a series of hockey games. Which measure suggests that Jun tended to score the highest in each game?
- mean ✓
- median
- mode
- range
-
- The table shows summary statistics about how many points each person scored during a series of hockey games. Which measure suggests that Aisha tends to score the highest in each game?
- mean
- median ✓
- mode
- range
-
- The table shows summary statistics about how many points each person scored during a series of hockey games. Whose scores tend to be the most consistent?
- Aisha
- Jun ✓
- Sofia
-
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Video
Lesson Details
Key learning points
- Stated conclusions should be critically evaluated to ensure validity.
- Certain statistical summaries may be omitted in the real world.
- In order to make more accurate conclusions, you need the data set and the conditions it was collected in.
Common misconception
Reporting two averages when asked to make two comparisons between sets of data.
Mean, media and mode essentially measure the same thing: central tendency. So use one of the comparisons to comment on the spread of data.
Keywords
Statistical summary - A statistical summary sums up the features of a data set.
Central tendency - A summary measure that attempts to describe a whole set of data with a single value that represents the middle or centre of its distribution
Range - The range is a measure of spread. It is found by finding the difference between the highest and lowest values
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