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t scores, z scores, standard scores and percentile ranks 
20101125 

Imogen pose la question : I have an assignment that requires me to calculate the t scores, z scores, standard scores and percentile ranks of 3 children on a vocab task. I am struggling with how to calculate the correct Tscores for the children, my tutor has said that the sample has a mean of 50 and standard deviation of 10. So on a z score of 2.0 (2 SD's from the mean) it would be 50 + 10+10 = T score of 70. However the Z scores i have are not whole numbers so I am struggling with it, i have one that is 1.27 , another that is 0.47 and the last one is 0.80. If you could help me on how to calculate these to get T scores that would be great. Thanks. Robert Dawson lui répond. 


