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If a researcher wishes to study the effect of, for example, a new drug on blood pressure, what type of testing should be used and why?
Should it be a z-test, a t-test, or an ANOVA for the analysis? Please help. What would the choice of test depend on? Would the hypothesis be directional or non-directional? Would the test be one-tailed or two-tailed? What would be the null and what would be the alternative hypothesis? I am so lost in this class so any help would be great!
a binomial distribution has 50 trials n 50 with a probability of success of 0.50 ?0.50. we would like to find the
Does the process appear to have been in control? Determine control limits for future production.
news reports tell us that the average american is overweight. many of us have tried to trim down to our weight when we
An auditor for a Health Maintenance service of Georgia reports 40% of policyholder 55 years or older submit a claim during the year. Fifteen policyholders are randomly selected for company records.
Construct a 95 percent confidence interval for the true mean order size. (b) How could the confidence interval be made narrower? (c) Do you think the population is normal?
No estimate of the population proportion is available. How large a sample is required?
Assuming we can verify that the data set is approximately normally distributed, what percentage of times will the server be down less than 24 minutes?
In an online survey of 4001 respondents, 8% were classified as productivity enhancers who are comfortable with technology and use the internet for its practical value. Suppose you select a sample of 400 students at your school, and the population ..
At a = 0.01, can it be concluded that the variance of the areas for counties in Indiana is less than the variance of the areas for counties in Iowa?
researchers can run t-tests on which type of variables?a a group variable and continuous variableb two criterian
In a regional spelling bee, the 8 finalists consist of 3 boys and 5 girls. Find the number of sample point the sample space S for the number of possible orders at the conclusion of the contest
a fire detection device utilizes three temperature-sensitive cells acting independently in such a manner that any one
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