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A normal population has a mean of 18.1 and a standard deviation of 4. Refer to the table in Appendix B.1.
a. Compute the z-value associated with 25.0. (Round the final answer to 2 decimal places.)
z =
b. What proportion of the population is between 18.1 and 25.0? (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 18.0? (Round z-score computation to 2 decimal places and the final answer to 4 decimal places.)
You just finished getting your data, made sure there were no fliers and the data was correct You created a mean and standard deviation and ran your Z test at the 0.05 alpha Your decision rule is 1.645 and your Z test statistic ( step 3 ) is 1.647
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