2.Which of the following statements about confidence intervals is FALSE?A.If we keep the sample size fixed, the confidence interval gets wider as weincrease the confidence coefficient.The confidence interval for a mean always contains the sample mean.If we keep the confidence coefficient fixed, the confidence interval getsnarrower as we increase the sample size.B.B.C.D.If the population standard deviation increases, the confidence intervaldecreases in width.A restaurant manager is considering a new location for her restaurant. Theprojected annual cash flow for the new location is:al Cash FlowProbabilityThe expected cash flow for the new location is:A.$10,000 $30,000 $70,0000.100.150.50$12,800$64,000C.D.$90,0000.15$70,000$60,000$100,000?

"As per the Bartleby guidelines, we are entitled to solve only one question at a time.As you have…

Answered: 2. Which of the following statements…

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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You are interested in constructing a 95% confidence interval for the proportion of all caterpillars that eventually become butterflies. Of the 409 randomly selected caterpillars observed, 58 lived to become butterflies. Round answers to 4 decimal places where possible. a. With 95% confidence the proportion of all caterpillars that lived to become a butterfly is between _________ and _________. b. If many groups of 409 randomly selected caterpillars were observed, then a different confidence interval would be produced from each group. About _________ percent of these confidence intervals will contain the true population proportion of caterpillars that become butterflies and about ____________ percent will not contain the true population proportion.
Which of the following statements is correct about confidence intervals? A. Higher confidence levels result in narrower confidence intervals. B. Higher confidence levels result in lower standard error of the mean. C. The goal of constructing a confidence interval is to estimate the population mean from the sample mean. D. Both A and C.
C?
A 95% confidence interval for the proportion of young adults who skip breakfast is .20 to .27. Which one of the following is a correct interpretation of this 95% confidence interval? 1 We are 95% confident that the sample proportion of young adults who skip breakfast is between .20 and .27. 2 We are 95% confident that the proportion of young adults in the population who skip breakfast is between .20 and .27. 3 The proportion of young adults who skip breakfast 95% of the time is between .20 and .27. 4 We are 95% confident no mistakes were made when the interval from .20 to .27 was computed.
RD.24.
Ch. 6.1 CI We examine the effect of different inputs on determining the sample size needed to obtain a specific margin of error when finding a confidence interval for a proportion. Find the sample size needed to give, with 95% confidence, a margin of error with +/- 6% when estimating a proportion. Within +/- 4%. Within +/- 1%. (Assume no prior knowledge about the population proportion p). Comment on the relationship between the sample size and the desired margin of error.
Use the sample information. X = 40, 0 = 4, and n= 20 to calculate the following confidence intervals assuming the sample is from a normal population. A. 90% confidence from____to____ (Round 4 decimal places.) B. 95% confidence interval is from_____to_____ (Round 4 decimal places.) C. 99% confidence interval is from______to_____ (Round 4 decimal places.) D. Describe how the intervals change as you increase the confidence level. A. The interval gets narrower as the confidence level increases B. The interval gets wider as a confidence level decreases C. The interval gets wider as a confidence level increases D. The interval stays the same as the confidence level increases
Provide an appropriate response. Suppose you have obtained a confidence interval for u, but wish to obtain a greater degree of precision. Which of the following would result in a narrower confidence interval? L Increasing the sample size while keeping the confidence level fixed II. Decreasing the sample size while keeping the confidence level fixed III. Increasing the confidence level while keeping the sample size fixed IV. Decreasing the confidence level while keeping the sample size fixed O A. , IV O B. I, II OC. II, IV O D. II, II O E. II, IV
If you increase the confidence level, the confidence interval ________________. A.stays the same B.decreases C.may increase or decrease, depending on the sample data D.increases
You are interested in constructing a 99% confidence interval for the population of all caterpillars that eventually become butterflies. Of the 413 randomly selected caterpillars observed, 59 lived to become butterflies. Round answers to 4 decimal places where possible. a. With 99% confidence the proportion of all caterpillars that lived to become a butterfly is between _________ and ________. b. If many groups of 413 randomly selected caterpillars were observed, then a different confidence interval would be produced from each group. About ________ percent of these confidence intervals will contain the true population proportion of caterpillars that become butterflies and about ________ percent will contain the true population proportion.

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