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In designing an experiment involving a treatment applied to 5 test subjects researchers plan to use a simple random sample of 5 subjects from a pool of 65 available subjects. Answer below.
A. how many different simple random samples are possible?
A researcher tested the reading ability of two groups of primary care patients. The scores on the test range from 1 to 9 with 9 indicating a high degree of reading ability and 1 very limited reading ability.
Is there significant evidence that this production run doesn't meet specifications? Use a 1% level of significance.
rolling dice 25 times gives the below results. using your results find the relative frequency for each of the values 2
Suppose there is no cyclical component. Quarterly billing for water usage is shown below describe summer billing for year 5.
In an effort to estimate the mean amount spent per customer for dinner at a major Atlanta restaurant, data were collected for a sample of 49 customers. At 95% confidence, what is the margin of error (to 1 decimal)?
On a test whose distribution is approximately normal with a mean of 50 and a standard deviation of 10, the results for three students were reported as follows:
Given the linear correlation coefficient r and the sample size n, determine the critical values of r and use your finding to state whether or not the given r represents a significant linear correlation
In exercise identify (a) sample and (b) population. Also, find whether sample is likely to be representative of population.
a test for a certain disease is found to be 96 accurate meaning that it will correctly diagnose the disease in 96 out
In order to test the effectiveness of a drug called XZR designed to reduce cholesterol levels, 9 heart patients' cholesterol levels are measured before they are given the drug.
Average Precipitation For the first 7 months of the year, the average precipitation in Toledo, Ohio, is 19.32 inches. If the average precipitation is normally distributed with a standard deviation of 2.44 inches, find these probabilities.
the population in millions and the violent crime rate per 1000 were recorded for 10 metropolitan areas. the data are
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