Answered: er energy field. She flipped a coin to…

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter10: Statistics

Section10.6: Summarizing Categorical Data

Problem 10CYU

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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 286 trials, the touch therapists were correct 129 times. Complete parts (a) through (d).

A.) Given that Emily 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 make random guesses?

B.) Using Emily's sample results, what is the best point estimate of the therapists' success rate?

C.) Using Emily's sample results, construct a 95% confidence interval estimate of the proportion of correct responses made by touch therapists.

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