Question

A​ 9-year-old girl did a science fair 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 her hand without seeing it and without touching it. Among 282 ​trials, the touch therapists were correct 117 times. Use a 0.10 significance level to test the claim that touch therapists use a method equivalent to random guesses. Do the results suggest that touch therapists are​ effective?

What is the test statistic for this hypothesis test ---------? round to two decimal places

Answer 1

Given, Sample size = n = 282 ___ X = 117 sample poopustion. 282 L P = 0.41497 P = 0.4149 The null and altemative hypothesis is Hoiu=0.5 HM 20.5 Test statistic-2- P-P - [P(I-PT Vn 0.4149-0.5 10.5(1-0.5) 282 Test statistic=2= -2.86 Test statis.