For the distribution with X values and frequencies: 4 with 1, 3 with 2, 2 with 4, 1 with 2, what is ΣX?

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 distribution with X values and frequencies: 4 with 1, 3 with 2, 2 with 4, 1 with 2, what is ΣX?

Explanation:
The sum of X values across all observations is found by weighting each value by how often it occurs and then adding those products. Multiply each value by its frequency: 4×1 = 4, 3×2 = 6, 2×4 = 8, and 1×2 = 2. Add them together: 4 + 6 + 8 + 2 = 20. So ΣX = 20. (Total observations are 1+2+4+2 = 9, so the mean would be 20/9 ≈ 2.22 if you need it.)

The sum of X values across all observations is found by weighting each value by how often it occurs and then adding those products. Multiply each value by its frequency: 4×1 = 4, 3×2 = 6, 2×4 = 8, and 1×2 = 2. Add them together: 4 + 6 + 8 + 2 = 20. So ΣX = 20. (Total observations are 1+2+4+2 = 9, so the mean would be 20/9 ≈ 2.22 if you need it.)

More Multiple Choice Questions
Subscribe

Get the latest from Passetra

You can unsubscribe at any time. Read our privacy policy