# Ch 6B C-W - a z>-2.05 b z<.33 c 1.2< z< 1.8 d...

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Intro Stats – Classwork Chapter 6 B 1. Some IQ tests are standardized to a Normal Distribution with a mean of 100 and standard deviation of 16. a) In what interval you expect the central 95% of IQ scores to be found? b) What percent of people should have IQ scores above 116? c) What percent of people should have IQ scores between 68 and 84? d) What percent of people should have IQ scores above 132? 2. What percent of a standard Normal model is found in each region (shade the region)

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Unformatted text preview: a) z>-2.05 b) z< -.33 c) 1.2 < z < 1.8 d) |z|< 1.28 3. In a standard normal model what value of z cuts off the region described (shade the region) a) the highest 20% b) the highest 75% c) the lowest 3% d) the middle 90% 4. Find the missing parameter of N( μ , σ ) model a) μ = 1250, 35% below 1200, σ = ? b) σ = 0.5, 90% above 10, μ = ? 5. Exercise 42, p. 126 . Normal Curves (print for the future use)...
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Ch 6B C-W - a z>-2.05 b z<.33 c 1.2< z< 1.8 d...

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