A distribution of values is normal with a mean of 87.6 and a
standard deviation of 39.3.
Find P25, which is the score separating the
bottom 25% from the top 75%.
P25 =
Enter your answer as a number accurate to 4 decimal places.
Here we need to find x such that
Using standard normal table we get
So
Hence
A distribution of values is normal with a mean of 87.6 and a standard deviation of...
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Question 22 A distribution of values is normal with a mean of 28.8 and a standard deviation of 20.8. Find the probability that a randomly selected value is greater than -31.5. P(X > -31.5) - Enter your answer as a number accurate to 4 decimal places. Submit Question Question 23 A distribution of values is normal with a mean of 71.9 and a standard deviation of 68. Find the probability that a randomly selected value is between - 138.9 and...