Therapeutic touch(TT) practitioners claim to perceive an energy field above apatient's skin. To test this claim a TT practitioner wasblind-folded and the researcher placed her hand over either the right or left hand of the practitioner. Let p denote the probability of a correct prediction by a TT practitioner. An experiment used 12 TT practitioners who had to predict the correct hand in each of 12 trials. Complete parts a through e.

a. Define the parameter of interest and set up hypotheses to test that the probability of a correct guess is 0.50 against the TTpractitioners' claim that it exceeds 0.50.

Define a parameter of interest. Choose the correct answer below.

A.

=standard deviation of correct guesses

B.

=average number of correct guesses

C.

p=probability of a correct guess

Your answer is correct.

Set up the hypotheses for the hypothesis test.

H0: p

p

equals

=

0.50

0.50

Ha: p

p

greater than

>

0.50

0.50

(Type integers or decimals. Do notround.)

b. The 144 trials had 84 correct guesses. Find and interpret the test statistic.

Select the correct choice below and fill in the answer box to fulfill your choice.

(Round to two decimal places asneeded.)

A.

The test statistic is z=

nothing

, which represents the difference between the sample estimate and the null hypothesis value.

B.

The test statistic is z=

nothing

, which represents the number of standard errors that the estimate falls from the null hypothesis value.