Assume that a random variable is normally distributed with a mean of 1500 and a variance of 324. What is the probability that a randomly selected value will be greater than 1550? What is the probability that a randomly selected value will be less than 1485? What is the probability that a randomly selected value will be between 1475 and 1535?
Added by Kevin V.
Step 1
78$ Step 3: Use a standard normal distribution table or calculator to find the probability of z being greater than 2.78. This gives us a probability of approximately 0.0027. Step 4: Calculate the z-score for the second question (less than 1485): $z = \frac{1485 - Show more…
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