Standard Normal drill.(a) Find the number z such that the proportion of observations
Chapter 0, Problem 3.31(choose chapter or problem)
Standard Normal drill.(a) Find the number z such that the proportion of observations that are less thanz in a standard Normal distribution is 0.8.(b) Find the number z such that 35% of all observations from a standard Normaldistribution are greater than z.ACT versus SAT. There are two major tests of readiness for college: the ACT andthe SAT. ACT scores are reported on a scale from 1 to 36. The distribution of ACTscores in recent years has been roughly Normal with mean = 20.9 and standarddeviation = 4.8. SAT scores are reported on a scale from 400 to 1600. SAT scoreshave been roughly Normal with mean = 1026 and standard deviation = 209.Exercises 3.32 to 3.43 are based on this information.
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