Chapter 7: Class Worksheet Confidence interval to estima mmands summary for Chapter 7 CASE 2 population mean / Standard deviation of the population o is CASE 1 given of the 10 is NOT Critical values; Instructor: T. Steffy uple an Z score under "lator normal tandard CRITICAL VALUES 7. Chapter 7: Class Worksheet A CLINICAL value Due: on TEST 3 day of the standard normal distribution. occur form those that are unlikely. It is denoted by Za/2, that is a z score which separates an area of a/2 in the_ Find Critical Values: is the number on the borderline separating sample statistics that are likely to Let's find the cutoff score for za/2 with a CL of 90%. tail If the CL is 90%, doesn't that make the a 10%? Then what is - ?. size ni L state one You need to find za/2, the cutoff value (or "critical value") where "% lies to the right of that critical value. Let's use the sketch below and StatCrunch to find that critical values. .ple ) = 0.10 Problem #4: a) Find the critical values Za/ that corresponds to CL of 80% b) Find the critical values Za/ that corresponds to o = 0.04. StatCrunch Commands : stat