GCSE Mathematics. Targeting Grade C. Handling Data Unit 3 Interpreting Graphs. If not you need. TOP: Practise interpreting different charts Practice 1: What do scatter diagrams tell you? Practice 2: How do you read a line graph? Practice 3: How to compare box plots.
Targeting Grade C
Unit 3 Interpreting Graphs
If not you need
TOP: Practise interpreting different charts
Practice 1: What do scatter diagrams tell you?
Practice 2: How do you read a line graph?
Practice 3: How to compare box plots.
Practice 4: What do stem and leaf diagrams tell you?
TOP:Make two comments for each of the following charts. Also,
state which bar is the mode.
The number of people who play golf are represented in this pictogram
Represents 20 golfers
2) The bar chart shows information about the favourite drink of each student in a class.
Practice 1: Look at the following scatter diagrams. Do they have positive or negative correlation and what does that mean?
Practice 2: For the following line graph, answer the questions given.
1) Barry’s pulse rate is taken every 6 hours over 3 days. The graph shows his pulse rate in beats per minute.
Practice 3: Compare the following box and whisker plots. Remember to compare
the median (middle bar in the box) and the lower and upper quartiles (lower and
upper bars of the box), as well as the start and end points of the whiskers.
Quartiles represent Quarters of the data – the lower quartile is ¼ of the data and is found ¼ of the way along the data set. The upper quartile is ¾ of the data and is found ¾ of the way along the data set. The median is ½ or 2/4 of the data.
Practice 4: For the following stem and leaf diagram, answer the questions given.
Sherri recorded the number of students late for school each day for 21 days. The stem and leaf diagram shows this information.
a) Find the median number of students late for school.
b) Work out the range of the number of students who are late for school.
Next for answers
Lower Quartile = 152
Upper Quartile = 177