Question 21

The student's estimated summative score is 2.2.

The student's estimated summative score, calculated using the average model, rounds to 2.2 when following the appropriate mathematical procedures.

A) 2.2

This option is correct as it accurately reflects the student's estimated summative score when rounded to the nearest tenth. The average model takes into account the relevant scores and calculates the result, leading to this final rounded figure.

B) 2

This option is incorrect because it underestimates the student's summative score. While 2 is a possible score, the calculations indicate a higher average, which rounds to 2.2 rather than 2.

C) 2.4

This option is also incorrect as it overestimates the student's summative score. The average model does not support a rounding to 2.4 based on the provided data, making this option invalid.

D) 1.5

This option is incorrect as it significantly underestimates the student's summative score. A score of 1.5 does not align with the calculated average, which rounds to 2.2.

Conclusion

The correct answer of 2.2 is definitively right due to its accurate representation of the student's estimated summative score based on the average model. All other options fail to reflect the proper rounding of the calculated average, either by underestimating or overestimating the score.