estimate from your bootstrap distribution in the previous step (show calculations).Use the 95%e. Is it plausible that there is no time savings from the flexible system?confidence interval to answer. If so, explain why. If not, interpret the confidence interval.Sections 3.1-3.4ΜΑΤΗ 1342Page 1 of 22. The meaning of 95% confidence. Which of the following best explains the meaning of 95% confidencein the interval given in the last question? Check only one.O The population mean is in this interval 95% of the timeO The population mean is believed to be in the interval. The methodology used to find this interval iscorrect 95% of the time.O There is a 95% chance that the sample mean from any random sample is in the interval.3. 3.128 Who Smokes More: Male Students or Female Students? Data 1.1 includes lots of information on asample of 362 college students. The complete dataset is available at StudentSurvey. We see that 27 of the193 males in the sample smoke, while 16 of the 169 females in the sample smoke. We will investigate thedifference in proportions of male and female students who smoke.a. What parameter(s) are we trying to estimate? Give correct notation and a brief writtendescription.b. What is the best point estimate for the difference in the proportions of smokers? Use correctnotation and include the value.c. Use Statkey to find a 99% bootstrap confidence interval using percentiles (attach screen shot withyour homework submission, and write the confidence interval here):d. Find a 95% bootstrap confidence interval using margin of error, based on the standard errorestimate from your bootstrap distribution in the previous step (show calculations).e. Is it plausible that the proportions of male and female students who smoke is the same?Use the 99% confidence interval to answer. If so, explain why. If not, interpret the confidenceinterval.Sections 3.1-3.4МАТH 1342Page 2 of 2II 1. 3.92 Better Traffic Flow. The dataset TrafficFlow gives delay time in seconds for 24 simulation runs inDresden, Germany, comparing the current timed traffic light system on each run to a proposed flexibletraffic light system in which lights communicate traffic flow information to neighboring lights. Since this isa matched pairs experiment, the variable Difference represents the time savings from the flexible system(Fixed – Flexible) for each run of the simulation. We wish to estimate the average time savings for publictransportation on this stretch of road if the city of Dresden moves to the new system. Set this up as a singlemean because it comes from one quantitative variable.What parameter are we estimating? Give correct notation and a brief written description.a.b. Answer these questions to establish the process of generating one bootstrap sample:i. What sample size would you use for your bootstrap sample?ii. Would you sample with or without replacement?iii. What statistic would you record for this one bootstrap sample? Use correct notation:c. Use Statkey to find a 90% bootstrap confidence interval for the mean time savings, usingpercentiles. Use a few thousand samples. Attach a screen shot showing the percentiles with yourhomework submission, and write the confidence interval here:d. Find a 95% bootstrap confidence interval using margin of error, based on the standard errorestimate from your bootstrap distribution in the previous step (show calculations).e. Is it plausible that there is no time savings from the flexible system?confidence interval to answer. If so, explain why. If not, interpret the confidence interval.Use the 95%Sections 3.1-3.4MATH 1342Page 1 of 22. The meaning of 95% confidence. Which of the following best explains the meaning of 95% confidencein the interval given in the last question? Check only one.O The population mean is in this interval 95% of the timeO The population mean is believed to be in the interval. The methodology used to find this interval iscorrect 95% of the time.O There is a 95% chance that the sample mean from any random sample is in the interval.3. 3.128 Who Smokes More: Male Students or Female Students? Data 1.1 includes lots of information on asample of 362 college students. The complete dataset is available at StudentSurvey. We see that 27 of the193 males in the sample smoke, while 16 of the 169 females in the sample smoke. We will investigate thedifference in proportions of male and female students who smoke.a. What parameter(s) are we trying to estimate? Give correct notation and a brief writtendescription.b. What is the best point estimate for the difference in the proportions of smokers? Use correctnotation and include the value.II

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2. The meaning of 95% confidence. Which of the following best explains the meaning of 95% confidence in the interval given in the last question? Check only one. O The population mean is in this interval 95% of the time O The population mean is believed to be in the interval. The methodology used to find this interval is correct 95% of the time. O There is a 95% chance that the sample mean from any random sample is in the interval.

2. The meaning of 95% confidence. Which of the following best explains the meaning of 95% confidence in the interval given in the last question? Check only one. O The population mean is in this interval 95% of the time O The population mean is believed to be in the interval. The methodology used to find this interval is correct 95% of the time. O There is a 95% chance that the sample mean from any random sample is in the interval.

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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If we find a 95% confidence interval using a sample, then we can say... 95% of individuals will fall on that interval there is a 5% chance the population proportion is NOT on the interval. 95% of our samples will fall on that interval. No answer text provided.
In a survey of 2345 adults, 729 say they believe in UFOs. Construct a 90 % confidence interval for the population proportion of adults who believe in UFOs. A 90%confidence interval for the population proportion is (Round to three decimal places as needed.) Interpret your results. Choose the correct answer below. A. With 90% confidence, it can be said that the sample proportion of adults who believe in UFOs is between the endpoints of the given confidence interval. B. With 90% probability, the population proportion of adults who do not believe in UFOs is between the endpoints of the given confidence interval. C. The endpoints of the given confidence interval shows that 90% of adults believe in UFOs. D. With 90% confidence, it can be said that the population proportion of adults who believe in UFOs is between the endpoints of the given confidence interval.
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It is desired to estimate the proportion of cannabis users at a university. What is the sample size required to if we wish to have a 95% confidence in the interval and an error of 10%? 385 68 10 97
Please answer the last two as stated by the tutor
If n = 580 and X = 464, construct a 90% confidence interval for the population proportion, p.Give your answers to three decimals______< p < ______
Please answer all. Thank you. A national random sample of 20 NCAE Scores from 2010 is listed below. 29,26,13,23,23,25,17,22,17,19 12,26,30,30,18,14,12,26,17,18 Calculate the 95 percent confidence interval for the mean NCAE score if the sample standard deviation is about 5.9407. A.) between 18.22 and 23.48 B.) between 18.07 and 23.63 C.) between negative infinity and 23.15 D.) between negative infinity and 23.05 The value of z selected for constructing a given confidence interval is called A.) confidence B.) error C.) student D.) critical value
Statistics students surveyed 135 students at Tallahassee Community College. From their data we are 95% confident that between 44.7% and 61.9% of all TCC students are female. The students realize that this interval contains a large margin of error. What can they do to make a narrower interval? 1. Survey more students. 2. Use a 99% confidence level. 3. Survey more students and use a 99% confidence interval. 4. None of the other choices.
Explain also how you use Z table ..
9 The standard error of the mean is, a 0.881 b 0.735 c 0.612 d 0.510
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