21. Touch Therapy When she was 9 years of age, Emily Rosa did a science fair experiment in which she tested professional touch therapists to see if they could sense her energy field. She to identify the selected hand by placing their hand just under her hand without seeing it and flipped a coin to select either her right hand or her left hand, and then she asked the therapists without touching it. Among 280 trials, the touch therapists were correct 123 times (based on data in "A Close Look at Therapeutic Touch," Journal of the American Medical Association, use a Vol. 279, No. 13). Use a 0.10 significance level to test the claim that touch therapists method equivalent to random guesses. Do the results suggest that touch therapists are effective? 22. Online Friends A Pew Research Center poll of 1060 teens aged 13 to 17 showed that 57% of them have made new friends online. Use a 0.01 significance level to test the claim that half of all teens have made new friends online. 23. Road Rage In a survey of 2705 licensed drivers aged 16 and older, 33% of those respon- dents reported that they make angry gestures while driving (based on data from the Automobile Association of America). Use a 0.05 significance level to test the claim that among licensed drivers aged 16 and older, the percentage who make angry gestures while driving is equal to 35%. Does the conclusion change if the significance level is changed to 0.01?