A cell phone manufacturing company claims that their phone batteries last up to 48 hours without a singlecharge. A random sample of 5000 cell phone batteries was tested. The researcher classified each battery aseither "stopped working (run out) before 48 hours", or "still working after 48 hours". A total of 55 out of the5000 batteries stopped working in less than 48 hours. Which one of the following statements is incorrect?a) The variable of interest is all batteries that stop working (run out)b) The proportion 0.011 (55 out of 5000) is a sample statisticc) The population of interest is all batteries produced by this companyd) The sampling unit is a battery

Given that A cell phone manufacturing company claims that their phone batteries last up to 48 hours…

Answered: A cell phone manufacturing company…

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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In a science fair project. Emily conducted an experiment in which she tested professional touch therapists to see if they could sense her energy field. She flipped a coin to select either her right hand or her left hand, and then she asked the therapists to identify the selected hand by placing their hand just under Emily's hand without seeing it and without touching it. Among 329 trials, the touch therapists were correct 157 times. Complete parts (a) through (d) a. Given that Emilv used a coin toss to select either her right hand or her left hand. what proportion of correct responses would be expected if the touch therapists made random guesses? (Type an integer or a decimal. Do not round.) b. Using Emily's sample results, what is the best point estimate of the therapists' success rate? (Round to three decimal places as needed.)
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