Exam 3 Review

# Exam 3 Review - “at least” ² This means \$(to the right...

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Exam 3 Review Chapter 7 - Continuous Random Variable X = (measuring someting) ! Z problems (Z is the standard normal random variable) • Find the area • Backwards problems (they give you the area and you find the value of Z) ! X problems (X is any normal random variable) • Find the area • Backwards problems (they give you the area and you find the value of X) ! Another Look at the Empirical Rule ! Using Excel • NORMDIST ² Used to find the area under a normal curve. • NORMINV ² Used for backwards problems. ! Key terms “no more than” ² This means # (to the left of)
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Unformatted text preview: “at least” ² This means \$ (to the right of) Chapter 8 - Sections 8.1 and 8.2 ! In these two sections, the population mean, μ, is known. ! These sections ask the question: How does the sample mean, , behave? X ! The Central Limit Theorem (CLT): The shape of the curve is a skinny normal curve X provided (1) the population shape (picture #1) is believed to be normal or (2) the sample size is large (generally, n \$ 30). ! In section 8.2, you are asked questions like: What is the probability that an average of 50 heights is > 5.8'?...
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