Descriptive statistics
Mean, median, standard deviation, quartiles and the normal distribution, applied to fitness test results.
- 19 cards
- 5 topics
- Free
The outline, topic by topic
Each topic is weighted the way the exam weighs it.
- Concepts
- The numbers
- The curves
- Scenarios
- Understand
A few cards from the deck
Mean: what is it?
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The sum of the values divided by how many there are.
It is sensitive to extreme values.
A class has 10 times over 100 m, including an injured pupil who walks. Which statistic best describes the typical time?
- The median
- The mean
- The maximum
- The range
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The median
An extreme value pulls the mean, not the median.
Median: what is it?
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The value splitting the ordered series into two halves of equal size.
Unlike the mean, it resists extreme values.
A cohort's MAS (maximal aerobic speed) is normally distributed with mean 14 km/h and standard deviation 2. What share of students is between 12 and 16 km/h?
- About 50 %
- About 95 %
- About 68 %
- 100 %
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About 68 %
12 to 16 is the mean plus or minus one standard deviation.