What is confidence interval? A.) it is a percentage of all possible samples that can be expected to include the true parameter. B.) It is a pair of numbers formed by the interval estimator. C.) It forms an interval within which the parameter expected to lie. D.) it is the range of values within which the true parameter lies. What are the three most commonly used confidence level? A.) 90%,97% and 99.99% B.) 90%,95% and 99% C.) 90%,95% and 100% D.) 80%,90% and 100% Please answer all. Thank you.

What is confidence interval? A.) it is a percentage of all possible samples that can be expected to include the true parameter. B.) It is a pair of numbers formed by the interval estimator. C.) It forms an interval within which the parameter expected to lie. D.) it is the range of values within which the true parameter lies. What are the three most commonly used confidence level? A.) 90%,97% and 99.99% B.) 90%,95% and 99% C.) 90%,95% and 100% D.) 80%,90% and 100% Please answer all. Thank you.

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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Identify a question you would like to answer using statistics which may be answered using a confidence interval in plain English. Example: What is the average GPA of an incoming student at MC Identify the parameter related to your question and its symbol and its name. Example: m, mean identify the statistic related to your question and its symbol Example: x(bar), sample mean List your data(try to get at least 10 in your sample). Example: 3.28, 2.41, 3.64, 1.28,3.56, 2.57, 3.10,2.94, 2.45, 3.16, 2.45 Describe your population of inteeest. Example: All students at MC Describe your sample. Example: 11 Studens in my statistics class Comment on how you obtained your sample Example: Conducted an email survey of the students in my statistics class Comment on the bias in your sample Example; This sample is biased since it is only people in math 117, who need certain perquisites to take the course, this underrepresents students without the…
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Suppose you calculate a 95% and 90% confidence interval for the true proportion of college students with student loan using the same data set. Which of the following must be true? a) The 95% confidence interval is wider than the 90% confidence interval. b) The 95% confidence interval is the same length as the 90% confidence interval. c) The 95% confidence interval is narrower than the 90% confidence interval. d) There is no way to tell from the given information.
What happens when we increase a confidence level C% from, say 90% to 99%? A) The range of the interval increases, because the margin of error increases. B) The range of the interval increases, because the margin of error decreases. C) The range of the interval decreases, because the margin of error decreases. D) The range of the interval decreases, because the margin of error increases.
Three hundred randomly selected people were asked a Yes or No question. The resulting 95% confidence interval for the proportion of Yes responses in the population is(.201, .299). How many people in the sample of 300 responded Yes? ______
If a confidence interval is __________, this means the point estimate is not directly in the center of the interval. A. two-sided B. symmetric C. non-symmetric D. inferential
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
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A 95% confidence interval for the population mean is calculated to be 75.29 to 81.45. If the confidence level is increased to 98%, the confidence interval will: A.become wider B.remain the same C.become narrower D.most likely no longer include the true value of the population mean
Explain what "98% confidence" means in a 98% confidence interval. What does "98% confidence" mean in a 98% confidence interval? CHU OA. If 100 different confidence intervals are constructed, each based on a different sample of size n from the same population, then we expect 98 of the intervals to include the parameter and 2 to not include the parameter. OB. The confidence interval includes 98% of all possible values for the parameter OC. The probability that the value of the parameter lies between the lower and upper bounds of the interval is 98%. The probability that it does not is 2% OD. The value of the parameter lies within 98% of a standard deviation of the estimate.
We randomly sample 218 individuals and find that 97 have a college degree. a.)Construct a 95% confidence interval. b.) Describe our interpretation of the confidence level.
Which of the following will increase the size of the confidence interval ?