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Lesson details
Key learning points
- In this lesson, we will investigate different kinds of correlation and interpret them from scatter graphs.
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4 Questions
Q1.
Look at the table below. How expensive is the car which is 5 years old?
£2,500
£4
Correct answer: £4,000
£4,000
£5,000
Q2.
Referring to the same table, which of these statements is FALSE?
Correct answer: If there was a car which was 3 years old, it would definitely be worth £4,500
If there was a car which was 3 years old, it would definitely be worth £4,500
On average, the older the car, the more expensive it is
The data shows the age and price for 10 cars
The mode price of car is £4,000
Q3.
The scatter graph below shows the temperature and the number of ice creams sold at the beach on certain days. What was the temperature, in degrees, when 20 ice creams were sold?
10
Correct answer: 15
15
20
25
Q4.
Referring to the scatter diagram above, which of the following statements is likely to be TRUE? Select one
Correct answer: A higher temperature caused the number of ice creams sold to increase
A higher temperature caused the number of ice creams sold to increase
It's impossible that only 5 ice creams were sold when the temperature was 25 degrees - the person plotting the graph must have made a mistake!
More ice creams sold caused the temperature to increase
Since there are two different numbers of ice creams sold when the temperature is 25 degrees, there must be a mistake on the graph
4 Questions
Q1.
What type of correlation does the following graph show?
Negative correlation
No correlation
Correct answer: Positive correlation
Positive correlation
Q2.
With which of these two variables would you expect to see negative correlation?
Correct answer: Amount of flu jabs and percentage of people getting the flu
Amount of flu jabs and percentage of people getting the flu
Number of hours studied and score in a test
Number of sandwiches made and cost to make them
Score in an IQ test and amount of tea drunk
Q3.
With which of these two variables would you expect to see no correlation?
Amount of flu jabs and percentage of people getting the flu
Number of hours studied and score in a test
Number of sandwiches made and cost to make them
Correct answer: Score in an IQ test and amount of tea drunk
Score in an IQ test and amount of tea drunk
Q4.
What variables could go on this graph?
Air conditioning bill on the x axis and heating bill on the y axis
Air conditioning bill on the x axis and temperature on the y axis
Temperature on the x axis and air conditioning bill on the y axis
Correct answer: Temperature on the x axis and heating bill on the y axis
Temperature on the x axis and heating bill on the y axis