Measures of Location and Spread (Leaving Cert Mathematics): Quizzes

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Mode, Median, and Mean
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What does an average allow us to do with a dataset?

Represent all values with one value

What is the mode?

The most frequently occurring value

When is the mode particularly useful?

Working with non-numerical data

Find the mode: 5,7,5,9,5,8,75, 7, 5, 9, 5, 8, 7

55

What is the median?

The middle value when ordered

What is the first step in finding the median?

Arrange numbers in order of size

Find the median: 2,5,8,112, 5, 8, 11

6.56.5

What is the formula for the mean?

Sum of numbers / number of numbers

Find the mean: 10,15,20,1510, 15, 20, 15

1515

4 students scored mean 70. 2 students scored mean 80. Find the overall mean.

73.3373.33

Which average is sensitive to extreme values?

Mean

For nn values (odd), which term is the median?

12(n+1)\frac{1}{2}(n + 1)

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Collecting Data and Sampling

Measures of Location and Spread

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Inferential Statistics

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Collecting Data and Sampling

Measures of Location and Spread

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Inferential Statistics

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Measures of Location and Spread

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Inferential Statistics

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Collecting Data and Sampling

Measures of Location and Spread

Representing Data

Inferential Statistics

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