OCR GCSE (9-1) Computer Science J277 -Guide to …

10. If z is a standard normal random variable, what is the variance of z? a) 0. b) 1. c) 4. d) It depends on what kind of standard normal variable you have A particular type of 4th grade Achievement Test provides overall scores that are normally distributed with a mean of 50 and a standard deviation of 10. Use this information for questions 11 ... ................
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