Multiple choice general knowledge

The exam scores of all 500 students were recorded and it was determined that these scores were normally distributed. If Jane's score is 0.8 standard deviation above the mean, then how many, to the nearest unit, students scored above Jane?

  1. 394

  2. 250

  3. 400

  4. 106

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

In a normal distribution, 0.8 standard deviations above the mean corresponds to approximately 78.81% of the population below that point. This means about 21.19% scored above Jane. For 500 students: 500 × 0.2119 ≈ 106 students scored higher. The other options (394, 250, 400) don't match this calculation.