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In an experiment on a new drug to determine the most effective dosage and method of administration, subjects were randomly assigned to either 5, 10, 15, or 20 mg of the active drug. In addition, the method of delivery of the drug (patch,pill, or nasal mist) was considered. In this experiment, there were how many treatments?
Suppose that you're charged with comparing results of standardized tests from four different school districts. What statistical technique would you choose to use?
Area to right of mean of normal probability distribution is?
Find the test statistic value for two mean tests in large sample.
Use the given confidence level and sample data to find a confidence interval for estimating the population mean
You had calculated the following measures of central tendency: the mean, the median, and the mean trimmed 25%. Which of these measures of central tendency will change when you correct the recording error?
The diameters of oranges in the certain orchard are normally distributed with the mean of 5.26 inches and a standard deviation of 0.50 inches.
To test whether or not there is a difference between treatments A, B, and C, a sample of 12 observations has been randomly assigned to the 3 treatments.
Normal approximation to the Binomial distribution - Evaluate the probability that at least 195 of the students are female.
The statistical research was done primarily through the internet from governmental regulated sources. Estimates were used in consideration of absence of actual information.
At the .01 significance level, is there a difference in the use of the four entrances?
If the lowest score you can earn and still be eligible for employment is an 84, what is the mean score for the exam? Round your answer to the nearest tenth.
What was the probability that a student worked a part time job or made the Dean's list. Interpret the results.
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