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Quiz_6_STA2023_Intro_to_Statistics_Fall_2016_2.docx
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Quiz 6 STA2023 Intro to Statistics Fall 2016 2.d...
Quiz_6_STA2023_Intro_to_Statistics_Fall_2016_2.docxTake the Quiz Again Suppose that
Quiz 6 STA2023 Intro to Statistic...
Quiz_6_STA2023_Intro_to_Statistics_Fall_2016_2.docxTake the Quiz Again Suppose that
Page 1
Take the Quiz Again
Suppose that 75% of adult Americans agree that, while downloading music from the Internet and then selling it is
question is:
approximately Normal, with mean 0.75 and standard error 0.0612.
Binomial, with n=50 and p=0.75.
neither Normal, not Binomial.
1 / 1 pts
Question 1
Quiz 6
Due
Oct 20 at 11:59pm
Points
6
Questions
6
Available
Oct 17 at 8am  Oct 20 at 11:59pm
4 days
Time Limit
60 Minutes
Allowed Attempts
3
Instructions
Calculator: Yes
You may use the textbook and lab workbook.
Attempt History
Attempt
Time
Score
KEPT
Attempt
2
12 minutes
6 out of 6
LATEST
Attempt
2
12 minutes
6 out of 6
Attempt
1
18 minutes
3 out of 6
Correct answers are hidden.
Score for this attempt:
6
out of 6 Submitted Oct 19
at 5:04pm This attempt
Page 2
took 12 minutes.
Page 3
Correct  the distribution of phat will not be approximately Normal if np and n(1p) is greater than or equal
to 15. The sampling distribution of phat is never Binomial, because the sample proportion is not a count.
approximately Normal, with unknown mean and standard deviation.
The sampling distribution of the sample proportion is approximately normal with a mean equal to p and a st
15. If either one of the conditions is not met, the sampling distribution of the sample proportion
is neither approximately normal nor binomial.
The sampling distribution of the sample proportion is approximately normal with a mean equal to p and a st
15. If either one of the conditions is not met, the sampling distribution of the sample proportion
is neither approximately normal nor binomial.
Binomial, with n=200 and p=0.13.
approximately Normal, with unknown mean and standard deviation.
neither Normal, not Binomial.
approximately Normal, with mean 0.13 and standard error 0.0238
Suppose 13% of American adults believe that the highest priority of America is to protect freedom of speech. We
sampling distribution of the sample proportion of people who answer yes to the question is:
1 / 1 pts
Question 2
Nine percent of Americans say they are well informed about politics in comparison to most people. You randomly sam
1 / 1 pts
Question 3
Page 4
Yes to the question?
0.6879
0.6808
Can not be determined.
0.3192
0.47
Remember that np and n(1p) must be greater than or equal to 15 for you to be able to complete the problem
score. (phat  p)/sqrt(p(1p)/n). Use the zscore and the ztable to ﬁnd the correct probability.
Remember that np and n(1p) must be greater than or equal to 15 for you to be able to complete the problem
score. (phat  p)/sqrt(p(1p)/n). Use the zscore and the ztable to ﬁnd the correct probability.
0.9925
0.0040
0.9960
0.0075
Can not be determined.
Suppose that 76% of Americans prefer Coke to Pepsi. A sample of 200 was taken. What is the probability
that at least sixty eight percent of the sample prefers Coke to Pepsi?
1 / 1 pts
Question 4
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