Practice_Quiz_KEY (2)

Practice_Quiz_KEY (2) - 11S-STATS10-1 Quiz 7 due Monday...

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3/14/12 10:06 AM 11S-STATS10-1: Quiz 7 due Monday, May 30, 2011 Page 1 of 5 CCLE Update this Quiz 11S-STATS10-1 Quizzes Quiz 7 due Monday, May 30, 2011 Review of attempt 1 1 Marks: 1 Choose one answer. A. The true proportion of the population who prefered Brand A popcorn is 3% higher than the proportion of the population that prefer Brand B. B. Three percent of the population was surveyed. C. It would be unlikely to get the observed proportion of 65% unless the actual percentage of people who preferred Brand A is between 62 and 68 percent. D. Three percent of the population surveyed will change their minds. A survey was conducted at a movie theater to determine movie-goers' preference for different popcorn. The results of the survey show that Brand A was preferred by 65% of the people with a margin of error of plus or minus 3 percent. What does the statement "plus or minus three percent" mean? Make comment or override grade Correct Quiz 7 due Monday, May 30, 2011 Review of attempt 1 GAMBOA, NANCY AURELIA Started on Friday, May 27, 2011, 03:54 PM Completed on Friday, May 27, 2011, 04:02 PM Time taken 8 mins 22 secs Marks 9/9 Grade 10 out of a maximum of 10 ( 100 %) ALMOHALWAS, AKRAM M. | Help | Logout Winter 2012 - Week 10 Info Preview Edit Results Overview Regrade Manual grading Item analysis
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3/14/12 10:06 AM 11S-STATS10-1: Quiz 7 due Monday, May 30, 2011 Page 2 of 5 Marks for this submission: 1/1. 2 Marks: 1 Choose one answer. A. The distribution of the 100 sample proportions is approximately normal. B. The distribution of the sample proportions would be closer to normal if the number of marketing research firms examined was increased to more than 100. C. The distribution of the sample proportions would be
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Practice_Quiz_KEY (2) - 11S-STATS10-1 Quiz 7 due Monday...

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