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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 changes untreated overtime. Systolic blood pressures are measured at baseline and again 4 weeks later. Compute a 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
Heights are sampled of kids from three schools. Using a 0.05 significance level, if when looking at ANOVA results, your p-value is 0.04, what can you say about your sample data? No minimum word count.
The diameters of oranges in a certain orchard are normally distributed with a mean of 5.26 inches and a standard deviation of 0.50 inches.
A monthly report to the Texas Department of Health, division of Water Hygiene, contained the following water production data in thousands of gallons:
We wish to estimate the population proportion. We want to be 95 percent confident of our results and we want the estimate to be with .01 of the population parameter. No estimate of the population proportion is available. What value should we use f..
Anthony is measuring his participants' emotional states in two different ways (self-report and galvanic skin response) in order to gain a greater confidence that he is actually measuring the emotional that he thinks he is.
A population has mean 325 and variance 144. Suppose the distribution of sample means is generated by random samples of size 36.
In a normal frequency distribution, 32% of the cases:
You are picking up apples from a tree in a park. You are interested in estimating the mean weight of all apples in the park. Unfortunately you have only been able to find seven apples so far. Can you use the Central Limit Theorem to aid in your es..
Formulate and LP model for this problem using Excel. Sketch the feasible region for this problem using Excel. Find the optimal solution
Estimating a linear regression equation to predict the future values of the dependent variable Y.
A scatter plot and regression line can be used for all of the following EXCEPT
Describe what the researcher must do if one of the requirements is not met and give illustrations.
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