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Towards academic reading

Read the paragraph and answer the question below.

What Does A Degree of Error Mean?

When tests are used to measure something, a certain degree of error can be expected. This is because things can interfere with the measurement process. For example, in an exam situation, there might be noise in the room which makes it hard for students to concentrate. This can lead to errors in the assessment of the student's level of knowledge and ability.

Which factors may cause errors in assessing students' academic levels? Choose 2 correct answers.

A new immigrant takes an IQ test in a language he does not understand well.

Some of the test questions are ambiguous and can be understood in different ways.

A student did not invest enough time and effort in studying for the test.