. Given that , find .

Answer and explanation

Correct answer: B. 0.0228

  1. Step 1: Standardise: . Step 2. . Answer: 0.0228. Why not the others: 0.9772: That is , the lower tail. 0.0456: That doubles the tail, which is the two-tailed value. 0.4772: That is the area between the mean and .

Practise more Probability and statistics.

Free questions with an explanation for every one, and full timed Singapore GCE A-Level mock tests.