Consider this cumulative frequency table.

$\begin{array}{|ccc|}\hline x& f& \text{ Cumulative frequency }\\ 10& 3& 3\\ 15& 11& 14\\ 20& 16& n\\ 25& m& 42\\ 30& 8& 50\\ \hline\end{array}$

Find the values of $m$ and $n$.(Answer $m,n$ value)

Consider this cumulative frequency table.

$\begin{array}{|ccc|}\hline x& f& \text{ Cumulative frequency }\\ 10& 3& 3\\ 15& 11& 14\\ 20& 16& 30\\ 25& 12& 42\\ 30& 8& 50\\ \hline\end{array}$

Write down the value of mean.Answer up to one decimal values

Consider this cumulative frequency table.

$\begin{array}{|ccc|}\hline x& f& \text{ Cumulative frequency }\\ 10& 3& 3\\ 15& 11& 14\\ 20& 16& 30\\ 25& 12& 42\\ 30& 8& 50\\ \hline\end{array}$

Find the variance.(Answer up to two decimal values)

A survey was conducted of the number of mobile devices that families owned.

State whether the data is discrete or continuous

A survey was conducted of the number of mobile devices that families owned.

$\begin{array}{|ccccccc|}\hline \text{ Mobile devices }& 1& 2& 3& 4& 5& 6\\ f& 41& 60& 52& 32& 15& 8\\ \hline\end{array}$

Write down the mean number of mobile devices per family. (Answer up to two decimal values)

A survey was conducted of the number of mobile devices that families owned.

$\begin{array}{|ccccccc|}\hline \text{ Mobile devices }& 1& 2& 3& 4& 5& 6\\ f& 41& 60& 52& 32& 15& 8\\ \hline\end{array}$

Write down the standard deviation.

A survey was conducted of the number of mobile devices that families owned.

$\begin{array}{|ccccccc|}\hline \text{ Mobile devices }& 1& 2& 3& 4& 5& 6\\ f& 41& 60& 52& 32& 15& 8\\ \hline\end{array}$

Find how many families have a number of mobile devices greater than one standard deviation above the mean.

State whether the following description would generate discrete or continuous data: A student's grade on an IB SL Mathematics exam.

State whether the following description would generate discrete or continuous data.

The volume of water that a person uses when having a shower.