Math 117 chapter 3.3-3.4 group work solutions docx.docx -...

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Group Work #6 – Chapter 3 (3.3 – 3.4)Name ___________________________Math 117Date _________________________________Section 3.3: Constructing Bootstrap Confidence IntervalsProblem 1: Textbook PricesPrices of a random sample of 10 textbooks (rounded to the nearest dollar) are shown:$132 $87 $185 $52 $23 $147 $125 $93 a). What is the sample mean? $85 $72
b). Describe carefully how we could use cards to create one bootstrap statistic from this sample. Be specific.Place each number on a card and place them in a bag. Then, take out one randomly, write down the number and put the card back in the bag. Do this ten times and find the average of the 10 new numbers.c). Where will the bootstrap distribution be centered? What shape do we expect it to have?
Problem 2: Global Warning by Political PartyDoes belief in global warming differ by political party? When the question “Is there solid evidence of global warming?” was asked, the sample proportionanswering “yes” was 79% among Democrats and 38% among Republicans. bootstrap distribution for the difference in proportions (D¿^pA

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