Title: A statistics professor asked her students whether or not they were registered to vote. In a sample ...
Post by: coolcat on Aug 31, 2019
A statistics professor asked her students whether or not they were registered to vote. In a sample of 50 of her students (randomly sampled from her 700 students), 35 said they were registered to vote.
Find a 95% confidence interval for the true proportion of the professor's students who were registered to vote. (Make sure to check any necessary conditions and to state a conclusion in the context of the problem.)
Find a 95% confidence interval for the true proportion of the professor's students who were registered to vote. (Make sure to check any necessary conditions and to state a conclusion in the context of the problem.)
Title: A statistics professor asked her students whether or not they were registered to vote. In a sample ...
Post by: rand22 on Aug 31, 2019
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Title: A statistics professor asked her students whether or not they were registered to vote. In a sample ...
Post by: coolcat on Aug 31, 2019
Smart ... Thanks!
Title: A statistics professor asked her students whether or not they were registered to vote. In a sample ...
Post by: zar on Aug 31, 2019
A statistics professor asked her students whether or not they were registered to vote. In a sample of 50 of her students (randomly sampled from her 700 students), 35 said they were registered to vote.
Explain what 95% confidence means in this context.
Explain what 95% confidence means in this context.
Title: A statistics professor asked her students whether or not they were registered to vote. In a sample ...
Post by: Kailz1218 on Aug 31, 2019
If many random samples were taken, 95% of the confidence intervals produced would contain the actual percentage of the professor's students who are registered to vote.
Title: A statistics professor asked her students whether or not they were registered to vote. In a sample ...
Post by: Begonia on Aug 31, 2019
A statistics professor asked her students whether or not they were registered to vote. In a sample of 50 of her students (randomly sampled from her 700 students), 35 said they were registered to vote.
What is the probability that the true proportion of the professor's students who were registered to vote is in your confidence interval?
What is the probability that the true proportion of the professor's students who were registered to vote is in your confidence interval?
Title: A statistics professor asked her students whether or not they were registered to vote. In a sample ...
Post by: Gparker on Aug 31, 2019
There is no probability involved-once the interval is constructed, the true proportion of the professor's students who were registered to vote is in the interval or it is not.
Title: A statistics professor asked her students whether or not they were registered to vote. In a sample ...
Post by: Begonia on Aug 31, 2019
This calls for a celebration :raised_hands:
Title: A statistics professor asked her students whether or not they were registered to vote. In a sample ...
Post by: Lopezj273 on Aug 31, 2019
A statistics professor asked her students whether or not they were registered to vote. In a sample of 50 of her students (randomly sampled from her 700 students), 35 said they were registered to vote.
According to a September 2004 Gallup poll, about 73% of 18- to 29-year-olds said that they were registered to vote. Does the 73% figure from Gallup seem reasonable for the professor's class? Explain.
According to a September 2004 Gallup poll, about 73% of 18- to 29-year-olds said that they were registered to vote. Does the 73% figure from Gallup seem reasonable for the professor's class? Explain.
Title: A statistics professor asked her students whether or not they were registered to vote. In a sample ...
Post by: cooldawg69 on Aug 31, 2019
The 73% figure from Gallup seems reasonable since 73% lies in our confidence interval.
Title: A statistics professor asked her students whether or not they were registered to vote. In a sample ...
Post by: yuknam on Aug 31, 2019
A statistics professor asked her students whether or not they were registered to vote. In a sample of 50 of her students (randomly sampled from her 700 students), 35 said they were registered to vote.
If the professor only knew the information from the September 2004 Gallup poll and wanted to estimate the percentage of her students who were registered to vote to within ±4% with 95% confidence, how many students should she sample?
If the professor only knew the information from the September 2004 Gallup poll and wanted to estimate the percentage of her students who were registered to vote to within ±4% with 95% confidence, how many students should she sample?
Title: A statistics professor asked her students whether or not they were registered to vote. In a sample ...
Post by: Strategyboyz21 on Aug 31, 2019
ME = z*
0.04 = 1.96
n =
= 473.24 ≈ 474
Note: Since there are only 700 students in the professor's class, she cannot sample this many students without violating the 10% condition!
0.04 = 1.96
n =
= 473.24 ≈ 474Note: Since there are only 700 students in the professor's class, she cannot sample this many students without violating the 10% condition!
Title: A statistics professor asked her students whether or not they were registered to vote. In a sample ...
Post by: yuknam on Aug 31, 2019
I appreciate what you did here, answered it correctly :D