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Question 2 Normal model a.A cut-off score of 79 has been established for a sample of scores in which the mean is 67. If the

Question 2 Normal model

a.A cut-off score of 79 has been established for a sample of scores in which the mean is 67. If the corresponding z-score is 1.4 and the scores are normally distributed, what is the standard deviation?

b.The standard deviation of a normal distribution is 12 and 95% of the values are greater than 6. What is the value of the mean?

c.The mean of a normal distribution is 130, and only 3% of the values are greater than 155. What is the standard deviation?

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