You will need
- Tape measure
- Lead pencil
- Red and blue pens
- Copy of the scatter plot printout
- At least 10 people to survey
- Computer with internet access to complete the CensusAtSchool 2013 questionnaire
What to do
- Measure your height with a tape measure. Write it down on a piece of paper.
- Use a stopwatch to measure your resting heart rate. For instructions on how to take your heart rate, check out this Science by Email activity.
- Write down your heart rate with your height and sex.
- Have each other person measure their height and heart rate. Have them write these details, and their sex, on a piece of paper.
- Collect everyone’s pieces of paper.
- Look at the height on the first piece of paper. Get your scatter plot printout and find the height on the number line at the bottom of the page. Use a lead pencil to draw a line going straight up from that point.
- Find the heart rate on the number line on the left side of the page. Use a lead pencil to draw a line going across from that mark until it meets the vertical line you drew last step. Draw an X at the intersection – use a red pen if you’re looking at a girl’s information, and a blue pen if you’re looking at a boy’s. Erase all the pencil lines, leaving just the X.
- Take the next person’s information. Repeat Step 7 to plot a data point. Repeat this for every person’s information.
- Draw an oval around the girls’ data points in red, and one around the boys’ data in blue.
- Can you see a correlation between height and heart rate? Use the examples to the right to see what sort of correlation (if any) there is between height and heart rate.
- Complete these sentences:
As boys’ height _________________, boys’ heart rate _______________.
As girls’ height _________________, girls’ heart rate _______________.