AI generatedStatisticsKS3 / GCSE

Identifying an outlier on a scatter graph

Identifying an outlier on a scatter graph.

  • Plot paired observations as separate crosses. Do not join the points.
  • A best-fit line follows the overall trend, with points balanced around it.
  • Predictions are estimates. Extrapolation is less secure, and correlation alone does not establish causation.

Example 1

Identify the outlier and explain your choice.

Coordinate graph1234567891011510152025300R
R lies well away from the overall linear pattern. Its -value alone does not make it an outlier.
Point R is an outlier.

Example 2

Identify the outlier and explain your choice.

Coordinate graph12345678910115101520250R
R lies well away from the overall linear pattern. Its -value alone does not make it an outlier.
Point R is an outlier.

Your turn

Question 1

Identify the outlier and explain your choice.

Coordinate graph123456789101151015202530350R
Check answer
R lies well away from the overall linear pattern. Its -value alone does not make it an outlier.
Point R is an outlier.
Question 2

Identify the outlier and explain your choice.

Coordinate graph1234567891011510152025300R
Check answer
R lies well away from the overall linear pattern. Its -value alone does not make it an outlier.
Point R is an outlier.
Question 3

Identify the outlier and explain your choice.

Coordinate graph123456789101151015202530350R
Check answer
R lies well away from the overall linear pattern. Its -value alone does not make it an outlier.
Point R is an outlier.
Question 4

Identify the outlier and explain your choice.

Coordinate graph12345678910115101520250R
Check answer
R lies well away from the overall linear pattern. Its -value alone does not make it an outlier.
Point R is an outlier.
Question 5

Identify the outlier and explain your choice.

Coordinate graph123456789101151015202530350R
Check answer
R lies well away from the overall linear pattern. Its -value alone does not make it an outlier.
Point R is an outlier.
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