In a recent study on world happiness, participants were asked to evaluate their current lives on a scale from 0 to 10, where 0 represen the worst possible life and 10 represents the best possible life. The mean response was 5.5 with a standard deviation of 2.5. (a) What response represents the 87th percentile? (b) What response represents the 58th percentile? (c) What response represents the first quartile? ..... (a) The response that represents the 87th percentile is 4. (Round to two decimal places as needed.) (b) The response that represents the 58th percentile is 4. (Round to two decimal places as needed.) (c) The response that represents the first quartile is 4 (Round to two decimal places as needed.)

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...