In 1998, Emily Rosa et al. published an article in JAMA “investigat[ing] whether

Question

In 1998, Emily Rosa et al. published an article in JAMA “investigat[ing] whether TT [Therapeutic Touch] practitioners can actually perceive a ‘human energy field.’ … practitioners … were tested under blinded conditions to determine whether they could correctly identify which of their hands was closest to the investigator’s hand. Placement of the investigator’s hand was determined by flipping a coin.” If TT practitioners could not detect a human energy field, their chance of guessing correctly would have been 0.5.

What would the null hypothesis here be?

i) The chance of guessing correctly > 50%

ii) TT practitioners can not reliably detect a human energy field

iii) The chance of guessing correctly = 50%

(i) only

(ii) only

(iii) only

(ii) and (iii)

(i) and (ii)

(i) only

(ii) only

(iii) only

(ii) and (iii)

(i) and (ii)

Explanation / Answer

Answer: the null hypothesis here be The chance of guessing correctly = 50%

Option is only III)

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