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11SSTATS101: Quiz 7 due Monday, May 30, 2011
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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 moviegoers' 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.

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View Full Document3/14/12 10:06 AM
11SSTATS101: 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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 Statistical hypothesis testing

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