Detecting the difference in proportions

Assignment Help Basic Statistics

Reference no: EM13102600

A clinical trial was conducted comparing a new compound designed to improve wound healing in trauma patients to a placebo. After treatment for 5 days, 58% of the patients taking the new compound had a substantial reduction in the size of their wound as compared to 44% in the placebo group. The trial failed to show significance. How many subjects would be required to detect the difference in proportions observed in the trial with 80% power?

A two-sided test is planned at significance level of 0.05.

Reference no: EM13102600

Questions Cloud

Explaining binomial probability distribution : An article in USA Today stated that "Internal surveys paid for by directory assistance providers show that even the most accurate companies give out wrong numbers 15% of the time."

Evaluate the solubility of the two salts : Give explanation why it is not practical to evaluate the solubility of the two salts AX and BY2, by simply comparing the solubility product constants?

Simulation of queueing systems : Consider the following continuously operation job shop. Inter arrival times of jobs are described as follows: What is the average time for the 10 new jobs?

How development of atlantic world influence kingdoms : How did development of "Atlantic World" influence kingdoms and colonies which were part of it? Choose three examples and discuss.

Detecting the difference in proportions : The trial failed to show significance. How many subjects would be required to detect the difference in proportions observed in the trial with 80% power?

Calculate the specific heat : Calculate the specific heat was? Would your computed specific heat be , too low, too high or not affected if you had not dried the metal before placing it into the Styrofoam cup. Explain your answer?

Binomial distribution-us space shuttle reliability : Many vehicles used in space travel are constructed with redundant systems to protect the flight crew and their equipment. Find the probability that this shuttle component functions successfully if n = 2.

Estimate caffeine consumption in high school : An investigator wants to estimate caffeine consumption in high school students. How many students would be required to ensure that 95% confidence interval estimate for the mean caffeine intake (measured in mg) is within 15 units of the true mean? ..

Probability of tomato seeds germinate : A certain type of tomato seed germinates 90% of the time. A backyard farmer planted 25 seeds. What is the probability that exactly 20 germinate?

User Account

All Pages