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MEASURES OF DATA DISPERSION
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You are to work through the slide show and answer the questions as you go along. This exercise is not a race but a learning process, so take your time and make sure that you understand each slide.
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Slides
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Questions |
Answers |
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91 |
Why do we need to have measures of dispersion? |
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| 92 – 94 |
What is ‘range’?
How do we calculate it?
What are its advantages?
What are its disadvantages?
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95 – 97 |
What is ‘semi-interquartile range’?
How do we calculate it?
What are its advantages?
What are its disadvantages?
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95 – 97 |
Show an example calculation of a semi-interquartile range. |
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98 |
What is a ‘normal distribution’? |
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103 |
How do you calculate the standard deviation of a data set? |
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| Copy the table on slide 105 showing how to calculate the standard deviation. | ||
| 106 | What are the advantages of using the standard deviation? | |
| 106 | What are the disadvantages of using the standard deviation? | |
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Summarise slide 109. |
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