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# Test of Touch Therapy Nine-year-old Emily Rosa conducted

## Problem 14BSC Chapter 5.4

Elementary Statistics | 12th Edition

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Elementary Statistics | 12th Edition

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Problem 14BSC

Test of Touch Therapy Nine-year-old Emily Rosa conducted this test: A professional touch therapist put both hands through a cardboard partition and Emily would use a coin flip to randomly select one of the hands. Emily would place her hand just above the hand of the therapist, who was then asked to identify the hand that Emily had selected. Touch therapists believed that they could sense the energy field and identify the hand that Emily had selected. The trial was repeated 280 times. (Based on data from “A Close Look at Therapeutic Touch,” by Rosa et al Journal of the American Medical Association, Vol. 279, No. 13.)

a. Assuming that the touch therapists have no special powers and made random guesses, find the mean and standard deviation for the numbers of correct responses in groups of 280 trials.

b. The professional touch therapists identified the correct hand 123 times in the 280 trials. Is that result unusually low or high? What does the result suggest about the ability of touch therapists to select the correct hand by sensing an energy field?

Step-by-Step Solution:

Step 1 of 1</p>

a)

Here n=280 and the probability of success p = 0.5 because every coin has tossed two faces.

This give probability of failure q = 1 - p

So, q = 1 - p = 1 - 0.5 = 0.5

Therefore the mean and the standard deviation for the given binomial distribution is given as

The Mean of the formula is

μ=np

μ =(280) (0 .5)

μ =140

Therefore the mean μ =140

The formula of the standard deviation is given by

σ =

σ =

σ =

σ =...

Step 2 of 3

Step 3 of 3

##### ISBN: 9780321836960

Since the solution to 14BSC from 5.4 chapter was answered, more than 596 students have viewed the full step-by-step answer. This full solution covers the following key subjects: touch, hand, Emily, therapists, correct. This expansive textbook survival guide covers 121 chapters, and 3629 solutions. Elementary Statistics was written by and is associated to the ISBN: 9780321836960. The full step-by-step solution to problem: 14BSC from chapter: 5.4 was answered by , our top Statistics solution expert on 03/15/17, 10:30PM. The answer to “Test of Touch Therapy Nine-year-old Emily Rosa conducted this test: A professional touch therapist put both hands through a cardboard partition and Emily would use a coin flip to randomly select one of the hands. Emily would place her hand just above the hand of the therapist, who was then asked to identify the hand that Emily had selected. Touch therapists believed that they could sense the energy field and identify the hand that Emily had selected. The trial was repeated 280 times. (Based on data from “A Close Look at Therapeutic Touch,” by Rosa et al Journal of the American Medical Association, Vol. 279, No. 13.)a. Assuming that the touch therapists have no special powers and made random guesses, find the mean and standard deviation for the numbers of correct responses in groups of 280 trials.b. The professional touch therapists identified the correct hand 123 times in the 280 trials. Is that result unusually low or high? What does the result suggest about the ability of touch therapists to select the correct hand by sensing an energy field?” is broken down into a number of easy to follow steps, and 179 words. This textbook survival guide was created for the textbook: Elementary Statistics, edition: 12th.

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