HW7 - accurate? Are these assumptions met here? 6. 8.46...

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Stat 3011 Homework 7 Stat 3011: Homework 7 Due: Tuesday, March 24th Directions: Same directions as always (they are also written on the homework website). Assigned Exercises: 1. 8.1 (page 361) 2. 8.6 (page 361) 3. 8.12 (page 372) HINT: Recall that the standard error of ˆ p is p ˆ p (1 - ˆ p ) /n . 4. 8.14 (page 372) (a) book part a (b) book part b. Use Rweb to construct the 95% confidence interval. (See directions on the next page.) Recall that the answer Rweb gives is slightly different than you would get when calculating the interval by hand. (c) Use Rweb to calculate the 98% and 99% confidence intervals. You do not need to interpret these intervals! (d) What do the confidence intervals in parts b and c demonstrate about the relationship between the confidence level of a confidence interval and the width of the confidence interval? 5. 8.22 (page 373) (a) book part a (b) book part b (c) What assumptions must be met in order for the confidence interval in part a to be
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Unformatted text preview: accurate? Are these assumptions met here? 6. 8.46 (page 394) 7. 8.48 (page 394) 1 Stat 3011 Homework 7 Rweb Directions for Problem 4 Step 1. Open Rweb. (Access Rweb through the link on the homepage. If this takes you to a warning screen, clink on the Continue to this website link and log in to the U of M system.) Step 2. Enter the following code into the Big text box: prop.test(x=1093, n=1232, conf.level=0.95) prop.test(x=1093, n=1232, conf.level=0.98) prop.test(x=1093, n=1232, conf.level=0.99) NOTE: The rst line of code will give the 95% condence interval, the second line of code will give the 98% condence interval, and the third line of code will give the 99% condence interval. Step 3. Click the Submit button. Step 4. Print out the Rweb results page. 2...
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This note was uploaded on 10/02/2011 for the course STAT 3011 taught by Professor Wang,zhan during the Spring '09 term at Minnesota.

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HW7 - accurate? Are these assumptions met here? 6. 8.46...

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