Question

In a study of the effectiveness of a fabric device that acts like a support stocking for a weak or damaged heart, 110 people who consented to treatment were assigned at random to either a standard treatment consisting of drugs or the experimental treatment that consisted of drugs plus surgery to install the stocking. After two years, 35% of the 60 patients receiving the stocking had improved and 24% of the patients receiving the standard treatment had improved. (Use a statistical computer package to calculate the P-value. Use p_experimental − p_standard. Round your test statistic to two decimal places and your P-value to four decimal places.)

z=

p=

Answer 1

from above

z =1.25

p value =0.1050 ( please try 0.2100 if this is two tailed test)