Checking understanding of summary statistics from a frequency table | Starter Quiz | Oak National Academy

How many sevens are there in this set of data?

Answer explanation

The frequency or amount of sevens is 6.

What is the modal value of this set of data?

• 2

• 3

• 5

• 7

• 8

Answer explanation

7 appears more times in the list than any other value, so the mode is 7.

There are 325 pieces of data in an ordered data set. The median is the data value in position ___ in the data set.

The (arithmetic) mean for a set of numerical data is the ___ of the values divided by the number of values. It is a measure of central tendency representing the average of the values.

Answer explanation

The mean is calculated by finding the sum (or total) of the data and dividing by how many pieces of data there are.

A data set contains 125 pieces of data and has a sum of 2500. The mean of the data set is ___.

Answer explanation

The mean = 2500 ÷ 125 = 20. This means that a typical value of the data set is 20.

Match each summary statistic to its value for this set of data: 3, 9, 5, 8, 3, 4, 10.

• Median

• 5

• Range

• 3

• Mode

• 7

• Mean

• 6

Answer explanation

Putting the data in order first helps to get the median, mode and range. The sum of the data is 42 and there are 7 pieces of data, so the mean is 42 ÷ 7 = 6. The range is 10 − 3 = 7. The mode is 3 as it appears more than any other value.