A learner obtains an observed score of 70 and the test’s standard error of measurement is 3. Using 70 ± 1.96(SEM), which approximate interval results?

Correct answer: 64.1-75.9 70 ± 1.96 × 3 = 70 ± 5.88, which gives about 64.1 to 75.9.

• 61.0-79.0 61.0–79.0 uses about ±3 SEM (±9).
• 67.0-73.0 67.0–73.0 uses ±1 SEM (±3).
• 68.5-71.5 68.5–71.5 uses ±0.5 SEM (±1.5).