It is always good to have as narrow a confidence interval as possible, because a C.I. is an estimate of a parameter, and a narrower C.I. is a more precise estimate. In lecture we learned three factors that affect the width of a C.I. With all that in mind, which C.I. below has the combination that would make it the NARROWEST out of all four options? Group of answer choices A C.I. with n=55, 99% level of confidence, s = 20.4 (large standard deviation) A C.I. with n=55, 95% level of confidence, s = 2.1 (small standard deviation) A C.I. with n=45, 99% level of confidence, s = 2.1 (small standard deviation) A C.I. with n=45, 95% level of confidence, s = 20.4 (large standard deviation)

It is always good to have as narrow a confidence interval as possible, because a C.I. is an estimate of a parameter, and a narrower C.I. is a more precise estimate. In lecture we learned three factors that affect the width of a C.I. With all that in mind, which C.I. below has the combination that would make it the NARROWEST out of all four options? Group of answer choices A C.I. with n=55, 99% level of confidence, s = 20.4 (large standard deviation) A C.I. with n=55, 95% level of confidence, s = 2.1 (small standard deviation) A C.I. with n=45, 99% level of confidence, s = 2.1 (small standard deviation) A C.I. with n=45, 95% level of confidence, s = 20.4 (large standard deviation)

College Algebra

1st Edition

ISBN:9781938168383

Author:Jay Abramson

Publisher:Jay Abramson

Chapter9: Sequences, Probability And Counting Theory

Section9.7: Probability

Problem 1SE: What term is used to express the likelihood of an event occurring? Are there restrictions on its...

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What term is used to express the likelihood of an event occurring? Are there restrictions on its values? If so, what are they? If not, explain.
It is always good to have as narrow a confidence interval as possible, because a C.I. is an estimate of a parameter, and a narrower C.I. is a more precise estimate. In lecture we learned three factors that affect the width of a C.I. With all that in mind, which C.I. below has the combination that would make it the NARROWEST out of all four options? (Hint: compare the answer options to each other two at a time, and do a process of elimination). A) A C.I. with n=55, 99% level of confidence, s2 = 5.0 (small variance) B) A C.I. with n=75, 99% level of confidence, s2 = 28.5 (large variance) C) A C.I. with n=75, 95% level of confidence, s2 = 5.0 (small variance) D) A C.I. with n=55, 95% level of confidence, s2 = 28.5 (large variance)
It is always good to have as narrow a confidence interval as possible, because a C.I. is an estimate of a parameter, and a narrower C.I. is a more precise estimate. In lecture we learned three factors that affect the width of a C.I. With all that in mind, which C.I. below has the combination that would make it the NARROWEST out of all four options? (Hint: compare the answer options to each other two at a time, and do a process of elimination). Group of answer choices A C.I. with n=100, 95% level of confidence, s2 = 32.4 (large variance) A C.I. with n=100, 99% level of confidence, s2 = 6.1 (small variance) A C.I. with n=150, 99% level of confidence, s2 = 32.4 (large variance) A C.I. with n=150, 95% level of confidence, s2 = 6.1 (small variance)
Dylan wants to determine a 99 percent confidence interval for the true proportion p of high school students in the area who attend their home basketball games. Out of n randomly selected students he finds that that exactly half attend their home basketball games. About how large would n have to be to get a margin of error less than 0.02 for p?