STAT 2507A &acirc;€“ July 13

# STAT 2507A &acirc;€“ July 13 - STAT2507AJuly13...

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1 STAT 2507A – July 13 Jerry Situ 8.5 Summer 2009

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Review Before midterm – Foundation General uses of statistics Descriptive statistics Histograms, distributions, random variables Chapter 7 – How to select the sample. Relating  probability to inferences (Central Limit Theorem). Chapter 8, 9, 10 are about using tool. From Chapter  1 – 7 to make inferences. 2
Review – Chapter 8 Large sample inferences (CLT) Two ways to make inferences: Estimation: Point estimate estimators of µ and  Π Measures of accuracy: standard error, margin  of error, c.v. 3

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Example 8.4 A random sample of 50 internet users was polled to  find the amount spend watching tv in a week. The  people polled spent an average of 11.5 h/week  watching t.v., the standard deviation was 3.5 hours.
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STAT 2507A &acirc;€“ July 13 - STAT2507AJuly13...

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