In a random sample of 12 of Mrs. Murray’s AP Statistics students, the following test scores were recorded for the last test on Sampling Distributions: 99 95 98 76 85 90 61 87 89 55 100 77
Construct and interpret a 90% confidence interval for the mean test score in Mrs. Murray’s class.

The change in water level of a lake is modeled by a polynomial function, w(x). described how to find the x-intercepts of w(x) and how to construct a rough graph of w(x) so that the parks department can predict when there will be no chage in the water level. you may create a sample polynomial of degree 3 or higher to use in your explanations.