Midterm #2 Review

# Midterm #2 Review - Midterm #2 Review MATH 218 | Professor...

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1 Midterm #2 Review MATH 218 | Professor Lin I have designed this review to cover all the topics that I think are TESTABLE. This means a) it is longer than your actual midterm; b) some questions will be longer than others; and c) it is not going to be worded exactly like your midterm. SI Leader: Joy Chen November 2, 2008 1. Topics Covered 2. Tips for 218 Exams 3. Formulas 4. Review Worksheet

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2 Topics Covered MIDTERM 1 CONCEPTS included but with emphasis placed on Chapter 5.5 The Poisson distribution 5.6 The uniform distribution 5.7 Exponential distribution (vs Poisson) 5.8 The normal distribution (and z-scores, or z-values) Chapter 6.1 Random sampling 6.2 Sample statistics and sampling distributions 6.3 Central limit theorem (sums and means) Chapter 7.1 Point estimators 7.2 Interval estimation of a mean 7.3 Confidence intervals for a proportion (Normal approximation to binomial distribution) (Continuity correction) 7.4 Sample Size Tips for 218 Midterms & Final You can use one sheet of handwritten notes, 8.5” x 11” page. Translate before you interpret . Take the sentence that is given, translate it into a P(X<3|Y=2) form (notation form) before trying to solve or interpret any of it Round to 4 decimal places, simplify all fractions to lowest terms. Study in class examples and homework problems, and KEEP PRACTICING. Math is not a memorizing subject, you must do problems in order to succeed. Showing all work means: o Write down all information given (or highlight, underline, etc) o Write down the formula o Plug in the numbers o Solve for the answer Double Check! o Asking for “how many ways” is not the same as asking for “probability of.” o Don’t forget “ - μ 2 ” when calculating the variance of a discrete random variable using the shortcut formula!! o P(new|sold) is not the same as P(sold|new) Plan your time accordingly. If there are 6 problems to do in 50 minutes, you have about 8 minutes per question. Be Efficient. BREATHE & RELAX. Joy’s Practice Midterm #2 I will email you the midterm link on Sunday night. Practice Midterm Q&A Session Tuesday, November 4, 2008 3-5pm in MHP B7B Bring: 1. Calculator (graphing if possible) 2. Student ID 3. Pencil & Eraser 4. Formula Sheet Handwritten 5. Extra Batteries just in case!
3 Midterm 2 Formulas

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8 Normal Approximation to the Binomial Distribution [With Continuity Correction] “Normal Approximation” - use the normal distribution to estimate a binomial probability because the binomial probability is too large to calculate by hand, one by one “Continuity Correction” - because you are using the normal distribution (continuous ) to estimate for a binomial distribution (discrete ), there will be an error unless you correct for it Step 1: Figure out what the problem is asking for. For example: P(10 ≤ X ≤ 13)
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## This note was uploaded on 01/30/2009 for the course MATH 39514 taught by Professor He during the Fall '08 term at USC.

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Midterm #2 Review - Midterm #2 Review MATH 218 | Professor...

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