72 80 82 a) Give a point estimate for the mean speed of all cars traveling on this highway. b) What is the standard error of the sample mean? c) (i) Construct a 96 % confidence interval for the mean speed of all cars traveling on this highway. (ii) Do you need to make any assumptions? Please state them. (iii) Interpretation of your Confidence interval . d)Does the true population mean lie in the interval calculatedabove? (Just circle the correct answer) Yes, No cannot tell nswer the following for the 96% confidence interval, assuming all other values remain the same. Just ciro nt answer. (i) How would the width of the confidence interval change if the confidence level increase to 99%? Would the width Increase decrease or remain the same? (ii) How would the width of the confidence interval change if the sample size n is decrease Would the width Increase decrease or remain the same?

72 80 82 a) Give a point estimate for the mean speed of all cars traveling on this highway. b) What is the standard error of the sample mean? c) (i) Construct a 96 % confidence interval for the mean speed of all cars traveling on this highway. (ii) Do you need to make any assumptions? Please state them. (iii) Interpretation of your Confidence interval . d)Does the true population mean lie in the interval calculatedabove? (Just circle the correct answer) Yes, No cannot tell nswer the following for the 96% confidence interval, assuming all other values remain the same. Just ciro nt answer. (i) How would the width of the confidence interval change if the confidence level increase to 99%? Would the width Increase decrease or remain the same? (ii) How would the width of the confidence interval change if the sample size n is decrease Would the width Increase decrease or remain the same?

Name: The following data give the speeds (in miles per hour) as measured by
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Description: The following data give the speeds (in miles per hour) as measured by radar, of 4 cars traveling onInterstate I-81:7672 80 82a) Give a point estimate for the mean speed of all cars traveling on this highway.b) What is the standard error of the sampl

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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Virginia wants to estimate the percentage of students who live more than three miles from the school. She wants to create a 95% confidence interval which has a margin of error of at most 5%. How many students should be polled to create the confidence interval? z0.10 z0.05 z0.025 z0.01 z0.005 1.282 1.645 1.960 2.326 2.576 Use the table of values above.
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