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The first part of this is already answered, just not sure about the second part. A clinical trial is planned to compare an experimental medication 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 measured 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
After the pilot study described in the above Problem, 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. Generate a 95% confidence interval for the difference in proportions of patients with hypertension between groups.
Experimental (n=100) =14%
Placebo(n=100)= 22%
A well-established power-drink dispensing machine is programmed to dispense an average of 2.02 liters into a container labled"2 liters". Actual quantities are known to be normally distributed with a standard deviation of 0.015 liters. What is the ..
Determine the range, variance, and standard deviation for the sample data.
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The following data shows the service ratings for eight ramdomly selected small ships, eight randomly selected large ships. All ships are rated on a 100-point scale, with higher valuse indicated better service (traveler Feb 2003)
Using a 1% level of significance, can the hypothesis that the distributions for the student's scores are identical be accepted?
Suppose standard deviation stays same, how much do you have to decrease your average production time so that 95% of time you can deliver product in under 75 hours?
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