MATHS - Statistics - Frequency Table Mean

The video tutorial explains how to calculate the mean from data presented in tables, including basic lists, frequency tables, and grouped data. It introduces the concept of mean as an average, describes the process of calculating mean from a frequency table using additional columns like 'fx' and 'total', and discusses estimating the mean from grouped data using midpoints. The tutorial also highlights the importance of understanding data intervals and provides examples for practice.

What is the mean of a dataset commonly referred to as?

• Average

• Mode

• Median

• Range

In a frequency table, what does the 'fx' column represent?

• Sum of frequencies

• Frequency divided by value

• Frequency multiplied by value

• Value divided by frequency

How do you calculate the mean from a frequency table?

• Find the midpoint of each value and divide by the frequency

• Add all values and divide by the number of values

• Multiply each value by its frequency, sum them up, and divide by the total frequency

• Add all frequencies and divide by the number of values

When dealing with grouped data, what is the first step in estimating the mean?

• Add all the values

• Find the midpoint of each interval

• Divide the total by the number of intervals

• Calculate the total frequency

Why is the mean calculated from grouped data considered an estimate?

• Because the frequency is unknown

• Because specific values are not available

• Because the intervals are unequal

• Because the data is incomplete