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?
Added by Krista L.
Step 1
70 that Z is less than a certain number. This means we need to find the value of Z such that P(Z < z) = 0.70. From the standard normal distribution table, we find that the z-score corresponding to a probability of 0.70 is approximately 0.525. Show more…
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