Scientists hypothesized that dietary fiber would impact blood cholesterol level of college students. The collected data and found r = -0.45 with a scattered plot residual plot. Interpret the scientist’ findings in context.

Monthly water bills for a city have a mean of $108.43 and a standard deviation of $36.98. find the probability that a randomly selected bill will have an amount greater than $173, which the city believes might indicate that someone is wasting water. would a bill that size be considered unusual?