World Happiness In a recent study on world happiness,
participants were asked to evaluate their current lives on a scale
from 0 to 10, where 0 represents the worst possible life and 10
represents the best possible life. The responses were normally
distributed, with a mean of 5.4 and a standard deviation of 2.2.
Find the probability that a randomly selected study participant’s
response was (a) less than 4, (b) between 4 and 6, and (c) more
than 8. Identify...