For the scores 1, 2, 1, 4, what is the value of Σ(X − 1)?

Study for the Psychology Statistics Test. Engage with interactive quizzes and detailed explanations. Equip yourself with the skills and confidence to succeed!

Multiple Choice

For the scores 1, 2, 1, 4, what is the value of Σ(X − 1)?

Explanation:
This asks you to sum deviations from 1: add up how far each score is from 1. Subtract 1 from each score: 1−1 = 0, 2−1 = 1, 1−1 = 0, 4−1 = 3. Then add these results: 0 + 1 + 0 + 3 = 4. You can also see it by the algebra rule Σ(X−1) = ΣX − n·1. Here ΣX = 1 + 2 + 1 + 4 = 8 and n = 4, so 8 − 4 = 4. The value is 4.

This asks you to sum deviations from 1: add up how far each score is from 1. Subtract 1 from each score: 1−1 = 0, 2−1 = 1, 1−1 = 0, 4−1 = 3. Then add these results: 0 + 1 + 0 + 3 = 4. You can also see it by the algebra rule Σ(X−1) = ΣX − n·1. Here ΣX = 1 + 2 + 1 + 4 = 8 and n = 4, so 8 − 4 = 4. The value is 4.

More Multiple Choice Questions
Subscribe

Get the latest from Passetra

You can unsubscribe at any time. Read our privacy policy