Need help with #16 DriveationsServiceskstoreentals1. If you increase the confidence level you would expect the confidence interval to bebecause to be more confident you would need to include[Select]possible values of the population parameter.2. If you decrease the confidence level you would expect the confidence interval to be[Select]because to be more confident you would need to include[Select][Select]possible values of the population parameter.3. True or False? Suppose a confidence interval actually contains the population parameter. Thesame data was used to make a confidence interval with a larger confidence interval you canconclude that the new interval will also include the true population parameter.[Select]4. True or False? Suppose a confidence interval actually contains the population parameter. Thesame data was used to make a confidence interval with a smaller confidence interval you canconclude that the new interval will also include the true population parameter.[Select]5. True or False? If we repeat the study and make a new confidence interval it will be centered atthe same value as the previous confidence interval. [Select]MacBook Air

The confidence interval is the range of values within which the value of population parameter is…

Answered: 1. If you increase the confidence level…

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.
Choose the correct terms below: 1. If you increase the confidence level you would expect the confidence interval to be Wider Narrower because to be more confident you would need to include the same number of less more possible values of the population parameter. 2. If you decrease the confidence level you would expect the confidence interval to be narrower wider because to be more confident you would need to include more the same number of less possible values of the population parameter. 3. True or False? Suppose a confidence interval actually contains the population parameter. The same data was used to make a confidence interval with a larger confidence interval you can conclude that the new interval will also include the true population parameter. True False 4. True or False? Suppose a confidence interval actually contains the population parameter. The same data was used to make a confidence interval with a smaller confidence interval you can conclude that the new…
Which statement is not true about confidence level? A.) 99 percent confidence interval procedure has a higher probability of producing intervals that will include the population parameter than a 95 percent confidence interval procedure. B.) a confidence interval between 20 percent and 40 percent means that population proportion lies between 20 percent and 40 percent. C.) an approximate formula for a 95 percent confidence interval which is equal to the sample estimate plus minus margin of error. D.) a confidence interval is an interval of value computed from the sample data that is likely to include the true population value. The z value which is used to construct a 99 percent confidence interval? A.) 1.28 B.) 1.645 C.) 1.96 D.) 2.575
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)
Sue and Javier are working on a statistics project to estimate the proportion of students at their school who have a pet dog. Sue selects a random sample of 81 students from the 2,400 students at their school, and Javier selects a separate random sample of 64 students. They will both construct a 90 percent confidence interval from their estimates. Consider the situation in which the sample proportion from Sue’s sample is equal to the sample proportion from Javier’s sample. Which of the following statements correctly describes their intervals? Select A, B, C, D, E Javier’s interval will have a greater degree of confidence than Sue’s interval will. A Sue’s interval will have a greater degree of confidence than Javier’s interval will. B The width of Sue’s interval will be the same as the width of Javier’s interval. C The width of Sue’s interval will be wider than the width of Javier’s interval. D The width of Sue’s interval will be narrower than the…
Suppose you compute a confidence interval with a sample size of 100. What will happen to the confidence interval if the sample size decreases to 80? options: A) Sample size will become wider if the confidence interval decreases B) Confidence interval will become narrower if the sample size is decreased. C) Sample size will become wider if the confidence interval increases D) Confidence interval will become wider if the sample size is decreased.
Sue and Javier are working on a statistics project to estimate the proportion of students at their school who have a pet dog. Sue selects a random sample of 81 students from the 2,400 students at their school, and Javier selects a separate random sample of 64 students. They will both construct a 90 percent confidence interval from their estimates. Consider the situation in which the sample proportion from Sue’s sample is equal to the sample proportion from Javier’s sample. Which of the following statements correctly describes their intervals? Javier’s interval will have a greater degree of confidence than Sue’s interval will. A Sue’s interval will have a greater degree of confidence than Javier’s interval will. B The width of Sue’s interval will be the same as the width of Javier’s interval. C The width of Sue’s interval will be wider than the width of Javier’s interval. D The width of Sue’s interval will be narrower than the width of Javier’s…
A member of the city government thinks that 90 percent confidence isn't enough. He wants to be 99 percent confident. How would the margin of error of a 99 percent confidence interval based on the same sample compare with the 90 percent interval found in the previous question? A) it would be the same becuase the sample is the same B) it would be larger becuase higher confidence requires a larger margin of error C)It would be smaller becuase it omits only 1% of the possible samples instead of 10% D) it is impossible to tell unless a census is taken E) it is impossible to tell becuase the margin of error is random
Greece has faced a severe economic crisis since the end of 2009. A Gallup poll surveyed 1,000 randomly sampled Greeks in 2011 and found that 25% of them said they would rate their lives poorly enough to be considered suffering. d) Without doing any calculations, describe what would happen to the confidence interval if we decided to use a higher confidence level. Assume everything else remains constant. A. The confidence interval would be narrower B. The confidence interval would remain the same C. The confidence interval would be wider e) Without doing any calculations, describe what would happen to the confidence interval if we used a larger sample. Assume everything else remains constant. A. The confidence interval would be wider B. The confidence interval would remain the same C. The confidence interval would be narrower
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)
. A researcher collects a sample of 24 measurements from a population and wishes to find a 99% confidence interval for the population mean. What value should he use for t*? b. If he instead decides to use a 95% confidence interval, will the interval be wider or be narrower or stay the same? Why?
A sample of 700 from population A has a proportion of interest of 0.24 while a sample of 600 from population B has a proportion of interest of 0.36. What is the point estimate and the 95% confidence interval of the difference between the population A proportion and the population B proportion? State your answer as a sentence.

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