The mean of a normal probability distribution is 440; the standard deviation is 70. Refer to the table in Appendix B.1. (Round the final answers to 2 decimal places.) a. About what percentage of the observations lie between 370 and 510? Percentage of observations % b. About what percentage of the observations lie between 300 and 580? Percentage of observations % c. About what percentage of the observations lie between 230 and 650? Percentage of observations %A normal population has a mean of 13.3 and a standard deviation of 3.1. Refer to the table in Appendix 3.1. a. Compute the z-value associated with 25.0. {Round the nal answer to 2 decimal places.) [1. What proportion of the population is between 133 and 25.0? [Round z-score computation to 2 decimal places and the nal 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} Proportion The amounts of money requested on home loan applications at Down River Federal Savings follow the normal distribution. with a mean of $68,000 and a standard deviation of $16,000. A loan application is received this morning. What is the probability that: {Round z-score computation to 2 decimal places and the final answer to 4 decimal places.) a. The amount requested is $83,000 or more? Probability b. The amount requested is between $55,000 and $33,000? Probability c. The amount requested is $55,000 or more? Probability |:|