Chapter 7 (6,7,8)

Help Save & Exit Submit Submit A normal population has a mean of 20 and a standard deviation of 4 6 a. Compute the z value associated with 24. (Round your answer to 2 decimal places.) 12.5 points eBook Print References b. What proportion of the population is between 20 and 247 (Round 2-score computation to 2 decimal places and your final answer to 4 decimal places.) Proportion m c. Whet proportion of the population is less than 15? (Round -score computation to 2 decimal places and your final answer to 4 decimal places.) IN Proportion lo 7 In New York State, the mean salary for high school teachers in 2017 was $104,210 with a standard deviation of $9.660. Only Alaska's mean salary was highert Assume New York's state salaries follow a normal distribution a. What percent of New York's state high school teachers earn between $89,000 and $94,000? (Round intermediate calculations to 2 decimal places and final answer to 2 decimal places.) 12.5 points Percent % BOOK Print References b. What percent of New York's state high school teachers earn between $94.000 and $109,000? (Round intermediate calculations to 2 decimal places and final answer to 2 decimal places.) Percent In c. What percent of New York's state high school teachers earn less than $79,000? (Round intermediate calculations to 2 decimal places and final answer to 2 decimal places.) log Percent % ME Chapter 7 Assignment i Seved Help Save & Exit Submit 8 The cost per item at a supermarket follows an exponential distribution. There are many inexpensive items and a few relatively expensive ones. The mean cost per item is $5.0. What is the percentage of items that cost: a. Less than $2.0? (Round your answer to 4 decimal places.) 125 Probability points cBook Print References b. More than $6,0? (Round your answer to 4 decimal places.) Probability c. Between $3.0 and $5.0? (Round your answer to 4 decimal places.) Probability Me Graw d. Find the 25th percentile, Seventy five percent of the supermarket items cost more than what amount? (Round your answer to 2 decimal places.) Amount Help Save & Exit Submit Submit A normal population has a mean of 20 and a standard deviation of 4 6 a. Compute the z value associated with 24. (Round your answer to 2 decimal places.) 12.5 points eBook Print References b. What proportion of the population is between 20 and 247 (Round 2-score computation to 2 decimal places and your final answer to 4 decimal places.) Proportion m c. Whet proportion of the population is less than 15? (Round -score computation to 2 decimal places and your final answer to 4 decimal places.) IN Proportion lo 7 In New York State, the mean salary for high school teachers in 2017 was $104,210 with a standard deviation of $9.660. Only Alaska's mean salary was highert Assume New York's state salaries follow a normal distribution a. What percent of New York's state high school teachers earn between $89,000 and $94,000? (Round intermediate calculations to 2 decimal places and final answer to 2 decimal places.) 12.5 points Percent % BOOK Print References b. What percent of New York's state high school teachers earn between $94.000 and $109,000? (Round intermediate calculations to 2 decimal places and final answer to 2 decimal places.) Percent In c. What percent of New York's state high school teachers earn less than $79,000? (Round intermediate calculations to 2 decimal places and final answer to 2 decimal places.) log Percent % ME Chapter 7 Assignment i Seved Help Save & Exit Submit 8 The cost per item at a supermarket follows an exponential distribution. There are many inexpensive items and a few relatively expensive ones. The mean cost per item is $5.0. What is the percentage of items that cost: a. Less than $2.0? (Round your answer to 4 decimal places.) 125 Probability points cBook Print References b. More than $6,0? (Round your answer to 4 decimal places.) Probability c. Between $3.0 and $5.0? (Round your answer to 4 decimal places.) Probability Me Graw d. Find the 25th percentile, Seventy five percent of the supermarket items cost more than what amount? (Round your answer to 2 decimal places.) Amount