91Ó°ÊÓ

³Ý´Ê±·(–$4,1$)

What is the median?

A bottle of water contains $12.05$fluid ounces with a standard deviation of $0.01$ounces. Define the random variable $X$in words. $X=$____________.

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= $7$, 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?

Suppose X ~ N(9, 5). What value of x has a z-score of –0.5?

Suppose X ~ N(2, 3). What value of x has a z-score of –0.67?