1. The mean of a normal probability distribution is 490; the standard deviation
ID: 3059152 • Letter: 1
Question
1. The mean of a normal probability distribution is 490; the standard deviation is 145.
Upper Value:
2. A normal population has a mean of 18.1 and a standard deviation of 2.9. Refer to the table in Appendix B.1.
Compute the z-value associated with 25.0. (Round the final answer to 2 decimal places.)
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.)
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.)
1. The mean of a normal probability distribution is 490; the standard deviation is 145.
Explanation / Answer
1. The mean of a normal probability distribution is 490; the standard deviation is 145.
Upper Value:
2. A normal population has a mean of 18.1 and a standard deviation of 2.9. Refer to the table in Appendix B.1.
Compute the z-value associated with 25.0. (Round the final answer to 2 decimal places.)
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.)
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.)
1. The mean of a normal probability distribution is 490; the standard deviation is 145.
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