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In a test with mean 60 and standard deviation 8, Ravi scored 76. What is his T-score and approximately what is his position in a normal dis…

In a test with mean 60 and standard deviation 8, Ravi scored 76. What is his T-score and approximately what is his position in a normal distribution?

  • AT = 60; at the 50th percentile
  • BT = 70; at about the 98th percentile
  • CT = 70; at about the 84th percentile
  • DT = 80; at about the 98th percentile
Correct answer: B

Explanation

z = (76 - 60) / 8 = 2. T = 50 + 10z = 70. About 97.7% of scores in a normal distribution lie below +2 SD.

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