Sedef's T-Score

Difficulty: Medium · Topics: Probability, Statistics, T-Scores

Three people took an exam.

Name Arzu Tuna Sedef --- --- --- --- Score 70 80 60

What is Sedef's T-score?

(Use the standard deviation s=√(Σ (x i-bar x)^2)/(n-1).)

(A T-score is T=50+10z, where z=(x-bar x)/(s) is the z-score.)