Z-score

Let z be a a random variable with a standard normal distribution. If P (a,z<1) = 0.1, determine the value of the z-score of a

jcooperxo said:

Let z be a a random variable with a standard normal distribution. If P (a,z<1) = 0.1, determine the value of the z-score of a

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Your post is incomplete!!

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jcooperxo said:

Let z be a a random variable with a standard normal distribution. If P (a,z<1) = 0.1, determine the value of the z-score of a

Click to expand...

The question is not clear unless we make assumptions. Is the "standard" normal distribution mean = 0 and standard deviation = 1? Does upper-case "P" represent the cumulative distribution? Then what would be the z-score (negative side) for which the cumulative distribution is 0.1?

All these questions would probably be answered if you showed us your work!