Pre-algebra
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Is X~N(0,1) a standardized normal distribution? Why or why not?
What is the z-score of x=12, if it is two standard deviations to the right of the mean?
What is the z-score of x= 9, if it is 1.5 standard deviations to the left of the mean?
What is the z-score of x= –2, if it is 2.78 standard deviations to the right of the mean?
What is the z-score of x= 7, if it is 0.133 standard deviations to the left of the mean?
15. Suppose X ~ N(2, 6). What value of x has a z-score of three?
Suppose X ~ N(8, 1). What value of x has a z-score of –2.25?
Pre-algebra
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