Scatter diagrams and correlations

Scatter diagrams and correlations

Multiple Choice

True or false?

Scatter plots have lines joining their dots.

• True

• False

Multiple Choice

This scatter plot shows that as the temperature goes up the number of pies sold:

• goes up

• goes down

• stays the same

Multiple Choice

You can see that as students get older, they do:

• more hours of homework

• fewer hours of homework

• the same hours of homework as when they were younger

Multiple Choice

True or false?

This scatter plot tells you that as temperature increases, sales of cold drinks also increase.

• True

• False

Multiple Choice

Which type of relationship does this scatter plot show between student age and hours of homework?

• No relationship

• A positive relationship

• A negativ relationship

Multiple Choice

True or false?

This scatter plot shows a clear relationship between the time spent watching television and the distance a student lives from school.

• True

• False

Multiple Choice

When there is no relationship between the two sets of data on a scatter plot, the diagram will show:

• randomly scattered dots

• dots going up from left to right

• dots going down from left to right

Multiple Choice

The scatter plot shows that:

• the newer a motor vehicle, the higher its selling price

• the newer a motor vehicle, the lower its selling price

Multiple Choice

This scatter plot relates the number of pens in students' pencil cases to the number of sandwiches in their lunchboxes.

Choose the correct word/s to complete the statement.

The scatter plot shows there is ____________ relationship between the number of pencils student carry and the number of sandwiches in their lunchboxes.

• a positive

• a negative

• no

Multiple Choice

Ethan surveyed two canteens and plotted their sunscreen sales against their sales of cold drinks.

Choose the correct statement using data from the diagram.

As sales of cold drinks increase, sunscreen sales:

• decrease

• do not change

• increase

Multiple Choice

Luke’s maths result was very good but his English result was very poor. Which dot is most likely to represent his results?

• A

• B

• C

• D

Multiple Choice

Areej got a very poor maths result but a very good English result. Which dot is most likely to represent her results?

• A

• B

• C

• D

Multiple Choice

Which diagram shows a negative relationship between Factors A and B?

Multiple Choice

Which diagram shows that as Factor A increases, Factor B also increases?

Multiple Choice

Choose the correct word/s to complete this statement.

This scatter plot shows that there is _______________ relationship between motor vehicle age and selling price.

• a positive

• a negative

• no

Multiple Choice

Which graph shows that Factor B remains unchanged as Factor A increases?

Multiple Choice

Stefan’s mark for Maths was the same as his mark for English. Which dot is most likely to represent his results?

• A

• B

• C

• D

Multiple Select

Choose all the statements which correctly describe this scatter plot.

• There is a strong positive relation between the two sets of marks.

• Students who did well in history did not do as well in art.

• There is a strong negative relation between the two sets of marks.

• Students who did well in history also did well in art.

  Answer

Multiple Choice

Which of the following plots shows the strongest negative relation between the two sets of data?

Multiple Choice

Which of these scatter plots shows the weakest relationship between the two sets of data?

Multiple Choice

Which of the following diagrams shows a weak positive relationship between the two sets of data?

Multiple Choice

If you plotted the sales of raincoats each day against the amount of rain falling each day you could expect:

• a strong negative relationship

• a weak negative relationship

• no relationship

• a positive relationship

Multiple Choice

A strong positive relationship between two sets of data means that as there is an increase in one, there is:

• a decrease in the other

• a definite increase in the other

• no obvious increase or decrease

• a definite decrease in the other

  Answer

Fill in the Blanks

Use the line of best fit to estimate the chemistry mark for a student who obtained a mark of 90 in mathematics.

Chemistry mark estimate is ...

Multiple Choice

Which graph shows the best trend line for this data?