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Gr 10 Math Lit: Ch 3.4 Summarise Data

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Questions and Answers

What is the primary purpose of summarising data?

To only use measures of central tendency

To only use measures of spread

To simplify the analysis process (correct)

To mention every piece of data in a report

What type of measure describes how data is dispersed?

Measure of spread (correct)

Mode

Median

Measure of central tendency

How is the mean calculated?

By finding the middle value when the data is arranged in ascending order

By adding all values together and multiplying by the number of values

By adding all values together and dividing by the number of values (correct)

By finding the value that appears most frequently in a dataset

What is the median of a dataset with an even number of values?

The average of the two middle values Signup and view all the answers

What is the mode of a dataset?

The value that appears most frequently in a dataset Signup and view all the answers

What is the formula for calculating the range?

Highest value - Lowest value Signup and view all the answers

What is the purpose of using measures of central tendency?

To show the central position of a dataset Signup and view all the answers

What is the modal class in a grouped dataset?

The group with the highest frequency Signup and view all the answers

Which measure of central tendency is most affected by extreme values in a dataset?

Mean Signup and view all the answers

What is the main advantage of using the median as a measure of central tendency?

It is resistant to extreme values Signup and view all the answers

Which of the following is NOT a measure of central tendency?

Range Signup and view all the answers

When would the mode be the most appropriate measure of central tendency to use?

When the data has multiple peaks Signup and view all the answers

What is the main limitation of using the range as a measure of spread?

It is sensitive to extreme values Signup and view all the answers

Which measure of central tendency would be the most affected by adding a large outlier to a dataset?

Mean Signup and view all the answers

What is the main advantage of using measures of central tendency and spread together?

They provide a complete picture of the data Signup and view all the answers

Which of the following is a characteristic of a measure of central tendency?

It is a single value that represents the dataset Signup and view all the answers