Uvero — STEM Learning

Planning a Data Investigation

A fair investigation asks a clear question, gathers relevant data, organises it and draws conclusions supported by the display. The sample and question must match the population claim. A careful solution names the quantities, keeps place value or units visible, and explains why each operation fits.

Worked reasoning

The sample should represent the target population.
Including learners from every class reduces selection bias.

Which is the best way to estimate all Grade 5 learners' travel time?

Survey a varied sample from every Grade 5 class

Ask only the first five arrivals

Ask only teachers

Guess from one learner

Which statement best captures the central mathematical idea in Planning a Data Investigation?

The sample and question must match the population claim.

A familiar-looking calculation may be used without checking place value, units, conditions or what the answer represents.

A memorised formula is valid even when its conditions are not met.

The diagram or notation replaces the need to justify each mathematical step.

When starting a problem about Planning a Data Investigation, which move is most reliable?

Represent the given information clearly and identify the operation or relationship required for planning a data investigation.

Round every value before identifying the mathematical structure.

Choose the longest available formula and substitute immediately.

Assume the desired conclusion and work backwards without checking equivalence.

Which statement is a misconception that must be rejected when working with Planning a Data Investigation?

A familiar-looking calculation may be used without checking place value, units, conditions or what the answer represents.

The sample and question must match the population claim.

Represent the given information clearly and identify the operation or relationship required for planning a data investigation.

Estimate first, then reverse the operation or use a second representation to check that the answer is reasonable.