For the scores 1, 0, 2, 4, what is the value of ΣX - 4?

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Multiple Choice

For the scores 1, 0, 2, 4, what is the value of ΣX - 4?

Explanation:
You’re testing how to apply a summation, then a simple subtraction. First add up all the scores: 1 + 0 + 2 + 4 = 7. Then subtract the 4 outside the sum: 7 − 4 = 3. So the value is 3. This approach is correct because the subtraction is outside the summation, not inside the sum (which would give a different result, e.g., Σ(X − 4) would be −9). The other numbers come from misplacing the subtraction or mis-summing.

You’re testing how to apply a summation, then a simple subtraction. First add up all the scores: 1 + 0 + 2 + 4 = 7. Then subtract the 4 outside the sum: 7 − 4 = 3. So the value is 3. This approach is correct because the subtraction is outside the summation, not inside the sum (which would give a different result, e.g., Σ(X − 4) would be −9). The other numbers come from misplacing the subtraction or mis-summing.

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