In a study of the effectiveness of a fabric device that acts like a support stocking...

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, 40% of the 60 patients receiving the stocking had improved and 30% 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	=

Do these data provide convincing evidence that the proportion of patients who improve is higher for the experimental treatment than for the standard treatment? Test the relevant hypotheses using a significance level of 0.05.

Yes

No

You may need to use the appropriate table in Appendix A to answer this question.

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orchestra answered 1 year ago

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