Data Handling Revision

What are the measures of central tendency? Select all that apply.

• Mean

• Median

• Mode

• Range

To find the average of a set of numbers, add up all values in the set and divide the answer...

• In half

• By the biggest value in the set

• By the smallest value in the set

• By the number of values in the set

The school principal collected data regarding each student's favourite subject. If the principal wanted to identify which subject was the most popular amongst the students, then the principal would be using the data to determine the...

• mean

• median

• mode

• range

True or False: A dataset can have more than one median?

• True

• False

When calculating the median of a set of data it is always important to first...

• order the data in descending order

• order the data in ascending order

• count the number of values in the dataset

• identify the minimum and maximum data values

The median is a number that divides a dataset so that..

• 50% of the data lies below the median and 50% of the data lies above

• 25% of the data lies below the median and 75% of the data lies above

• 75% of the data lies below the median and 25% of the data lies above

• some data lies below the median and the rest lies above, but it is impossible to know percentages without knowing the number of values in the dataset

True or False: It is possible for the mean, median and mode to all be equal for a given dataset.

• True

• False

The range measures the...

• location of the centre of the data

• size of the data

• dispersion of the data

• frequency of the data

True or False: A dataset can have more than one extreme value?

• True

• False

What is another name for an extreme value in a dataset?

• An abnormal data value

• An anomalous recording

• A deviation

• An outlier