Question

Let the random variable Z follow a standard normal distribution. a. The probability is 0.70 that Z is less than what number? b. The probability is 0.25 that Z is less than what number? c. The probability is 0.2 that Z is greater than what number? d. The probability is 0.6 that Z is greater than what number?

          Let the random variable Z follow a standard normal distribution.
a. The probability is 0.70 that Z is less than what number?
b. The probability is 0.25 that Z is less than what number?
c. The probability is 0.2 that Z is greater than what number?
d. The probability is 0.6 that Z is greater than what number?
        
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Principles of Economics
Principles of Economics
Gregory Mankiw 8th Edition
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Let the random variable Z follow a standard normal distribution. a. The probability is 0.70 that Z is less than what number? b. The probability is 0.25 that Z is less than what number? c. The probability is 0.2 that Z is greater than what number? d. The probability is 0.6 that Z is greater than what number?
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Transcript

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00:03 So in this first part here, if we have p of x, that's less than z, that's equal to 0 .70.
00:13 And so we can define z as equal to 0 .525 in the first example.
00:18 In my second example, we've got p of x is less than z.
00:22 This time it's equal to 0 .25, where we can define z as equal negative to 0 .675...
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