# Measures Of Central Tendency & Spread

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| By Dana Deuitch
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Dana Deuitch
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Quizzes Created: 3 | Total Attempts: 2,030
Questions: 9 | Attempts: 98

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One Variable Statistics - Measures of Central Tendency and Measures of Spread

• 1.

### Use the following set of data for all the questions:{4,5,5,5,5,6,7,7,7,8,9,11}Find the mean (correct to 2 decimal places)

Explanation
Add them all up and divide by the number of items.

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• 2.

### Use the following set of data for all the questions:{4,5,5,5,5,6,7,7,7,8,9,11}Find the median

Explanation
Find the middle value. (in this case halfway between the two middle values)

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• 3.

### Use the following set of data for all the questions:{4,5,5,5,5,6,7,7,7,8,9,11}Find the mode

Explanation
The most common value

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• 4.

### Use the following set of data for all the questions:{4,5,5,5,5,6,7,7,7,8,9,11}Find Q1

Explanation
Q1 is the median of the lower half of the data

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• 5.

### Use the following set of data for all the questions:{4,5,5,5,5,6,7,7,7,8,9,11}Find Q2

Explanation
Q2 is the median of the whole list

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• 6.

### Use the following set of data for all the questions:{4,5,5,5,5,6,7,7,7,8,9,11}Find Q3

Explanation
Q3 is the median of the upper half of the data

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• 7.

### Use the following set of data for all the questions:{4,5,5,5,5,6,7,7,7,8,9,11}Find IQR

Explanation
IQR = Q3 - Q1

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• 8.

### Use the following set of data for all the questions:{4,5,5,5,5,6,7,7,7,8,9,11}Find Range

Explanation
Range = Max - Min

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• 9.

### Use the following set of data for all the questions:{4,5,5,5,5,6,7,7,7,8,9,11}Find Standard Deviation (correct to 2 decimal places)

Explanation
First find the sum of all the x squared values (565), subtract the count (12) times the mean (6.5833333) squared, then divide by the count (12), and finally take the square root.

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