SOLUTION: A normal population has a mean of 18.3 and a standard deviation of 5. a. Compute the z value associated with 25.0. (Round the final answer to 2 decimal places.) b. What proport

Question 1198698: A normal population has a mean of 18.3 and a standard deviation of 5.
a. Compute the z value associated with 25.0. (Round the final answer to 2 decimal places.)
b. What proportion of the population is between 18.3 and 25.0? (Round z-score computation to 2 decimal places and the final answer to 4 decimal places.)
c. What proportion of the population is less than 18.0? (Round z-score computation to 2 decimal places and the final answer to 4 decimal places.)

Answer by Shin123(626) (Show Source): You can put this solution on YOUR website!
a) The z-value associated with 25.0 is .
b) We can use a z-table to find that the area associated with 1.34 is .90988. To get our answer, we just subtract the area that is less than 18.3. Since this is the mean, that area is 0.5, so the answer is 0.90988-0.5=0.4099 (rounding to 4 decimal places)
c) The z-value associated with 18.0 is -0.06. We can use a z-table to see that the answer is
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