Measures of Central Tendancy Flashcards

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1
Q

What is central tendency?

A

A statistical measure that representative for an entire distribution.

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2
Q

How is the mean calculated?

A

Add all values together divided by the number of values.

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3
Q

What are the advantages of using the mean?

A

‣ Most sensitive measure of central tendency because it takes into account exact distance between all values of data.

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4
Q

What are the disadvantages of using the mean?

A

‣ It can be easily distorted by one or more extreme value / anomaly which makes the value less representative of the whole data.
‣ Cannot be used with nominal data.

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5
Q

How is the median calculated?

A

Order the numbers and find the middle value.

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6
Q

What are the advantages of using the median?

A

‣ It is not affected by extreme values so can be useful.
‣ Appropriate to use with ordinal data and easy to calculate.

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7
Q

What are the disadvantages of using the median?

A

‣ The median is not as sensitive as the mean because exact values are not reflective in the median.

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8
Q

How is the mode calculated?

A

The value that is most common in a range of numbers.

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9
Q

What are the advantages of using the mode?

A

‣ The mode is also unaffected by extreme values and is much much useful for discrete data.
‣ The only method that can be used when the data is in categories.

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10
Q

What are the disadvantages of using the mode?

A

‣ It is not useful when describing data when there are several modes (interval, radio data etc).

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