GCSE Secondary Maths Age 13-17 - Probability & Statistics: Mean, Median and Range - Explained

The video tutorial explains how to calculate the median, range, and mean of a set of numbers. It highlights common mistakes, such as not ordering numbers when finding the median, and provides step-by-step instructions for each calculation. The tutorial also recaps key data concepts, including the mode, which is not covered in detail. The importance of understanding these concepts for exams is emphasized.

What is the first step in correctly finding the median of a set of numbers?

• Add all the numbers together

• Subtract the smallest number from the largest

• Order the numbers from smallest to largest

• Identify the most frequent number

How do you calculate the range of a dataset?

• Identify the most common number

• Subtract the smallest number from the largest number

• Find the middle number in the ordered list

• Add all the numbers and divide by the count

What is the mean of the numbers 12, 15, 14, 17, 22, 19, and 13?

• 18

• 15

• 16

• 17

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

• Median

• Range

• Mean

• Mode

What is the mode in a dataset?

• The average of all numbers

• The middle number in an ordered list

• The most frequently occurring number

• The difference between the largest and smallest numbers