Question Type 3: Given a frequency table, calculating the mean, median, modal class and range of the data Exercises

Question 1

Skill question

Given the following frequency table, calculate the mean of the data:

\begin{array}{c|c} \text{Class (marks)} & \text{Frequency} \\ \hline 0–9 & 3 \\ 10–19 & 7 \\ 20–29 & 5 \\ 30–39 & 4 \end{array}

Question 2

Skill question

Calculate the median of the data in the following frequency table:

\begin{array}{c|c} \text{Class (kg)} & \text{Frequency} \\ \hline 50–54 & 5 \\ 55–59 & 8 \\ 60–64 & 7 \\ 65–69 & 4 \end{array}