A trade magazine routinely checks the drive-through service times of fast-food restaurants. An 80% confidence interval resulting from examining 738 customers in one fast-food chain's drive-through has a lower bound of 177.5 seconds and an upper bound of 180.9 seconds. What does this mean?---Choose the correct answer below.- **A.** One can be ___% confident that the mean drive-through service time of this fast-food chain is between ___ seconds and ___ seconds.- **B.** One can be ___% confident that the mean drive-through service time of this fast-food chain is ___ seconds.- **C.** There is a ___% probability that the mean drive-through service time of this fast-food chain is between ___ seconds and ___ seconds.- **D.** The mean drive-through service time of this fast-food chain is ___ seconds ___% of the time.

Given Level of significance=0.20 Lower limit=177.5 Upper limit=180.9

Answered: A trade magazine routinely checks the…

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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2.3 The width of a confidence interval is a measure of its precision. The narrower the confidence interval, the more precise is the interval estimate, and vice versa. Describe any three aspects that influence the precision of the width of a confidence interval of a single population mean.
A 95% confidence interval is constructed in order to estimate the proportion of adults who own an iPhone. The resulting interval has a margin of error of 0.043. Which of the following would be the margin of error for a 90% confidence interval based on the same sample of data?
A graduate student is interested in how viewing different types of scenes affects working memory. For his study, he selects a random sample of 36 adults. The subjects complete a series of working memory tests before and after walking in an urban setting. Before the walk, the mean score on the test of working memory was 9.1. After the walk, the mean score was 1.4 higher. The graduate student has no presupposed assumptions about how viewing different types of scenes affects working memory, so he formulates the null and alternative hypotheses as: H00 : μDD = 0 H11 : μDD ≠ 0 Assume that the data satisfy all of the required assumptions for a repeated-measures t test. The graduate student calculates the following statistics for his hypothesis test: Mean difference (MDD) 1.4 Estimated population standard deviation of the differences (s) 1.6 Estimated standard error of the mean differences (sMDMD) 0.2667 Degrees of freedom (df) 35 The t statistic 5.25 The critical values of t…
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I'm stuck on part 2. Can you work the problem and explain how to get the answer to part B? If it can be put into the calculator, I can't remember the process. Please explain. Thank you. Translate the statement into a confidence interval. Approximate the level of confidence. In a survey of 1100 adults in a country, 68% think teaching is one of the most important jobs in the country today. The survey's margin of error is ±4%. Question content area bottom Part 1 The confidence interval for the proportion is . 64.64,. 72.72. (Round to three decimal places as needed.) Part 2 The interval is a enter your response here% confidence interval. (Round to one decimal place as needed.)
Please answer the attached question. Thanks.
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When you hold the mouse pointer over a point on the graph, the specific value corresponding to that point appears (e.g., “California, 2013 - 19.4%”) as well as a line called “90% Confidence” followed by an range of values. Generally speaking, what does the range of values denoted by “90% Confidence” indicate?
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