A medical researcher gives a new muscle relaxant to 200 patients and determinesthat 155 have beneficial results. The muscle relaxants currently in use have a success rate of 0.7. Test whether the new drug is superior to the existing drugs.

c) What is the value of the test statistic? Give your answer to two digits past the decimal.

d) What is the P-value or significance probability? Give your answer to 3 places past the decimal, without a leading zero.

*NOTE: I've worked with test statistics before but none that hadn't given me the standard deviation. Could you provide an explanation as well?