Chapter 05, Section 5.1, Additional Question 005 Your answer is partially correc

Question

Chapter 05, Section 5.1, Additional Question 005 Your answer is partially correct. Try again. The AAT is a standardized test with a known normal distribution having a mean of 400 and a standard deviation of 20. Round your answers to 2 decimal places. 3 a) What percentage of people would you expect to score 340 or lower? 6.7 b) What percentage of people would you expect to score 430 or higher? c) What percentage of people would you expect to score between 350 and 4507 98.8 Click if you would like to Show Work for this question: Open Show Work

Explanation / Answer

Mean = 400

Sd = 20

A) P(X < 340) = P((X - mean) /sd < (340-mean)/sd)

= P(Z < (340-400)/20)

= P(Z < - 3)

= 0.0013

= 0.13% (ans)

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