SOLUTION: A normal population has a mean of 10.5 and a standard deviation of 2. Refer to the table in Appendix B.1. a. Compute the z-value associated with 14.3. (Round the final answ

Question 1168013: A normal population has a mean of 10.5 and a standard deviation of 2. Refer to the table in Appendix B.1.

a. Compute the z-value associated with 14.3. (Round the final answer to 2 decimal places.)

z =

b. What proportion of the population is between 10.5 and 14.3? (Round z-score computation to 2 decimal places and the final answer to 4 decimal places.)

Proportion

c. What proportion of the population is less than 10.0? (Round z-score computation to 2 decimal places and the final answer to 4 decimal places.)

Proportion

Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
z=(x-mean)/sd
=3.8/2
=1.91
this is proportion of z-curve between 0 and +1.91
=0.4719
less than 10 is z<(-.5/2) or z<-0.25
that probability is 0.4013

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