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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A survey asked, "How many tattoos do you currently have on your body?" Of the 1241 males surveyed, 182 responded that they had at least one tattoo. Of the 1047 females surveyed, 139 responded that they had at least one tattoo. Construct a 99% confidence interval to judge whether the proportion of males that have at least one tattoo differs significantly from the proportion of females that have at least one tattoo. Interpret the interval. P1 Let p, represent the proportion of males with tattoos and p, represent the proportion of females with tattoos. Find the 99% confidence interval for p, - p2. The lower bound is The upper bound is (Round to three decimal places as needed.)
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Kit and Casey are each attempting to estimate the proportion of college students who can play at least one musical instrument. They each survey a different random sample of college students, and in each sample, the proportion who can play at least one musical instrument is 0.35. Kit and Casey each use their sample data to construct a confidence interval. Kit's interval is from 0.308 to 0.372 and Casey's interval is from 0.318 to 0.382. One of these intervals was computed correctly, but the other was not. Which interval must be incorrect? O Kit's interval must be incorrect. O It's impossible to answer this question without knowing the sample sizes. O It's impossible to answer this question without knowing the sample sizes or the level of confidence used for each interval. O Casey's interval must be incorrect. O It's impossible to answer this question without knowing the level of confidence used for each interval.
Find the confidence level and a for an 85% confidence interval. What is the confidence level? (Type an integer or a decimal.)
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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.
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