Central Tendencymedium
0:00.0
A grouped frequency table of test scores is shown below:
\hline
\text{Score Interval} & \text{Frequency (f)} \\
\hline
0 - 10 & 4 \\
10 - 20 & 8 \\
20 - 30 & 12 \\
30 - 40 & 6 \\
\hline
\end{array}$$
Which of the following statements about the estimated mean of the grouped data is/are correct?
A grouped frequency table of test scores is shown below:
\hline \text{Score Interval} & \text{Frequency (f)} \\ \hline 0 - 10 & 4 \\ 10 - 20 & 8 \\ 20 - 30 & 12 \\ 30 - 40 & 6 \\ \hline \end{array}$$ Which of the following statements about the estimated mean of the grouped data is/are correct?