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After the pilot study described in Problem2, the main trial is conducted and involves a total of 200 patients. Patients are enrolled and randomized to receive either the experimental medication or the placebo. The data shown in table 6-7 are data collected at the end of the study after 6 weeks on the assigned treatment. Generate a 95% confidence interval for the difference in proportions of patients with hypertension between groups.
A clinical trial is planned to compared an experimental mediciation designed to lower blood pressure to a placebo, before starting the trial, a pilot study is conducted involving 10 participants. The objective of the study is to assess how systolic blood pressure change untreated over time. Systolic blood pressure are mesaured at baseline and again 4 weeks later,
Computed 95% confidence interval for the mean difference in blood pressure over 4 weeks.
Baseline: 120 145 130 160 152 143 126 121 115 135
4 weeks: 122 142 135 158 155 140 130 120 124 130
Explain the distribution of mean of samples of size 15.
Find the average weight in pounds of a type of bird of your choice. Use the rational exponent equation L = 2.43 * W^0.3326 to estimate the wingspan L in feet of the bird that weighs W pounds (Rockswold, 2006).
Compute the kappa statistic and its standard error regarding reproducibility of the diagnosis of dyspnea in the clinic.
Compute the appropriate test statistic to test Ho: p = 80/100 vs. Ha: p > 80/100.
Compute the mean and variance of the following discrete probability distribution. A cola-dispensing machine is set to dispense on average 7.00 ounces of cola per cup. The standard deviation is 0.10 ounces. The distribution of amounts dispensed foll..
Given same values n=20, p=0.6, and x=17, calculate probability of x successes in n independent trails of experiment.
What if the size for each sample were increased to 20? Would a sample mean of 115 or more be considered unusual? Why or why not? Why is the Central Limit Theorem used?
Find the probability that the number of who consider themselves basketball fans is :
Humanities, 372; Natural Science, 415; Social Science, 511; Business Administration, 619; Philosophy, 196. Create a Pareto chart representing this information.
Same survey showed that average length of time each store was in bbusiness is 6 years, with standard deviation of 25 years. Which is more variable, number of magazines or number of years.
What should ING's General Counsel do to minimize ING's expected costs?
What are the assumptions of regression analysis and how do you evaluate them?
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