MATH 225N Statistics Quiz Week 6 (Correct Solutions)
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Question 1
A statistics professor recently graded final exams for students in her introductory statistics course. In a review
of her grading, she found the mean score out of 100 points was a x ̄=77, with a margin of error of 10.
Construct a confidence interval for the mean score (out of 100 points) on the final exam.
That is correct!
Answer: (67, 87)
Question 2
A random sample of adults were asked whether they prefer reading an e-book over a printed book. The
survey resulted in a sample proportion of p′=0.14, with a sampling standard deviation of σp′=0.02, who
preferred reading an e-book.
Use the empirical rule to construct a 95% confidence interval for the true proportion of adults who prefer e-
book
[Solved] MATH 225N Statistics Quiz Week 6 (Correct Solutions)
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- Submitted On 30 Oct, 2021 04:15:52
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