This back-to-back stem-and-leaf plot shows the weight, in kg, of boys and girls in an Year 10 class

a) Which is the only weight that was found to be same for one of the boys and one of the girls?
b) Are the number of boys less than, equal to or greater than the number of girls?
c) What is the outlier weight for the girls?
d) Which set of weights has the greater range?
e) What is the difference between the maximum weight of a boy and minimum weight of a girl?
f) What is the difference between the average weight of boys and girls, correct to one decimal?

The results for a writing task for 13 girls and 13 boys are:
\begin{array}{r|c|l}
\hline
\text{Boys }&&\text{ Girls}\\
\hline&3&4\,5\,7\\
\hline3&4&1\,5\,8\,8\\
\hline 8\,6\,6\,2&5&5\,5\,7\,9\\
\hline 7\,2\,2\,0\,0&6&0\,9\\
\hline 8\,8\,5&7&\\
\hline
\end{array}

a) Who scored the highest mark, a girl or a boy?
b) What is the median for boys?
c) What is the median for girls?
d) What percentage of boys scored more than 70?.
e) What percentage of girls scored more than 50?
f) Find the mean mark for boys correct to one decimal place

This histogram shows the number of children in a sample of families.

a) How many families were surveyed?
b) What percentage of families, to the nearest integer, consist only of adults?
c) Find the mode.
d) Find the range.
e) Find the median.
f) Find the mean, correct to 2 decimal places

From the data in the adjacent stem-and-leaf plot determine the median score

\begin{array}{|c|l|}
\hline
\text { Stem } & \text { Leaf } \\
\hline 1 & 1\,3\,5 \\
\hline 2 & 2\,4\,6 \\
\hline 3 & 1\,1\,2\,3 \\
\hline 4 & 2\,5\\
\hline
\end{array}

The adjacent histogram represents scores for a given test to a group of students.

a) The number of the students in the group is?
b) What is the score with the highest frequency?

What is the difference between the medians in group A and group B?

\begin{array}{|r|c|l|}
\hline
\text { Group A } & \text { Stem } & \text { Group B } \\
\hline 5\;3\;1 & 1 & 0\;3\;3\;4 \\
\hline 5\;5\;4\;0 & 2 & 1\;3\;3\;6\;7 \\
\hline 9\;7\;4\;2 & 3 & 2\;2\;2\;6 \\
\hline 3\;2\;2\;1 & 4 & 0\;4\;6\;8\\
\hline
\end{array}

The histogram gives the scores in a maths test with a maximum score of 5. 

i) How many students did the test
ii) What score was the mode?