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A clinical trial is conducted to compare an experimental medication to the placebo to reduce the symptoms of asthma. 200 participants are enrolled in the study and randomized to recieve either the experimental medication or placebo. The primary outcome is a self-reported reduction of symptoms. Among 100 participants who received the experimental medication, 38 reported a reduction of symptoms as compared to 21 participants of 100 assigned to the placebo.
a. Generate a 95% CI for the difference in proprotions of particpants reportinga reduction of symptoms between the experimental and placebo groupsb. Estimate the relative risk for the reduction in the symptoms between groups.c. Estimate the odds ratio for reduction in symptoms between groups.d. Generate a 95% CI for the Relative Risk.
At the .01 significance level, is there a difference in the use of the four entrances?
Produce the scatter plot for sodium and bp. Do you think there are any outliers?
For the following investigative scenarios, state the null hypothesis, and the alternative hypothesis. Also identify the Type 1 and Type 2 errors which can result based on the hypotheses that you defined.
lowering the price does not decrease this behavior and we should not decide to lower prices based on this research." Comment on the executive's conclusion. What type of inference is being made? Will the decision not to lower prices be a good one.
The following is a case-control study: Obtaining histories and other information from a group of known cases and from a comparison group to determine the relative frequency of a characteristic or exposure under study.
Evaluate the multiple regression model between quantity sold (Y) and following explanatory variables: average price of deep-dish pizzas, monthly advertising expenditures, and disposable income per household in areas surrounding outlets.
Descriptive statistics for given data - Evaluate the range, variance, and standard deviation of the data set. Interpret the results in the context of the real-life setting.
Infer that the difference in the level of satisfaction with service between the two branches.
Discuss which analysis of variance should be applied when an experiment has more than one independent variable. Discuss the assumptions and limitations of the analysis.
State the null hypothesis and the alternate hypothesis. State the decision regarding the null hypothesis.
The owner of a fish market has an assistant who has determined that the weights of catfish are normally distributed, with a mean of 3.2 pounds and a standard deviaition of 0.8 pound.
What is the difference between hypothesis and theory? If there is a difference between the two, what comes first - hypothesis or theory?
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