According to a study conducted by statistical organization the proportion of people who are satisfied with the way things are going in their lives is .80 suppose that a random sample of 100 people is obtained. what is the probability that the portion who are satisfied with the way things are going in their life exceeds .84

Ineed to know the answer to this algebra question.

Find the solution of each of the following.

There are two major tests of readiness for college: the act and the sat. act scores are reported on a scale from 1 to 36. the distribution of act scores in recent years has been roughly normal with mean µ = 20.9 and standard deviation s = 4.8. sat scores are reported on a scale from 400 to 1600. sat scores have been roughly normal with mean µ = 1026 and standard deviation s = 209. reports on a student's act or sat usually give the percentile as well as the actual score. the percentile is just the cumulative proportion stated as a percent: the percent of all scores that were lower than this one. tanya scores 1260 on the sat. what is her percentile (± 1)?