(d) The value used to estimate the proportion p of all adults who bought a lottery ticket in the past year is called a __________. A) Parameter B) Statistic C) Confidence Interval D) Mean Selection: C (g) An 80% confidence interval based upon this same sample would have: A) The same center and a larger margin of error. B) The same center and a smaller margin of error. C) A larger margin of error and probably a different center. D) A smaller margin of error and probably a different center. E) The same center, but the margin of error changes randomly. Selection: A (h) A member of the Lottery Commission requests a 90% confidence interval estimate but with a smaller margin of error. How can we get a smaller margin of error using 90% confidence? A) Take a smaller sample because smaller samples result in smaller margins of error. B) Take a larger sample because larger samples result in smaller margins of error. C) Take another sample of the same size because you might get lucky and get a smaller margin of error. D) Take a sample of the same size from the adults in Ohio instead of the entire country. Then the population will be smaller and this will give a smaller margin of error. Selection: B
(d) The value used to estimate the proportion p of all adults who bought a lottery ticket in the past year is called a __________.
A) Parameter
B) Statistic
C) Confidence Interval
D) Mean
Selection: C
(g) An 80% confidence interval based upon this same sample would have:
A) The same center and a larger margin of error.
B) The same center and a smaller margin of error.
C) A larger margin of error and probably a different center.
D) A smaller margin of error and probably a different center.
E) The same center, but the margin of error changes randomly.
Selection: A
(h) A member of the Lottery Commission requests a 90% confidence
A) Take a smaller sample because smaller samples result in smaller margins of error.
B) Take a larger sample because larger samples result in smaller margins of error.
C) Take another sample of the same size because you might get lucky and get a smaller margin of error.
D) Take a sample of the same size from the adults in Ohio instead of the entire country. Then the population will be smaller and this will give a smaller margin of error.
Selection: B
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