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If you want to be 95% confident of estimating the population proportion to within a sampling error of ±0.05, what sample size is needed?
The distribution of test scores is mui=35 and a standard deviation of 15. Do students taking the supplement have significantly better memory scores? Use a one-tailed t-test with an alpha=0.05.
the friendly neighbor grocery store has a single checkout stand with a full-time cashier. customers arrive randomly at
At the .05 level of significance, can we conclude that those joining Weight Reducers on average will lose less than 10 pounds? Determine the p -value.
Using the following data, test the question that an equal number of Democrats, Republicans, and Independents voted during the most recent election.
What is the difference between the critical-value method and the p-value method of hypothesis testing? Include in your post how the question's topic pertains to your health discipline.
At the .01 significance level, is there a relationship between job pressure and age?
Students at a major university are complaining of a serious housing crunch
In a 0ne-tail test (l side) with z score of 1.645, what are the percentages for critical value and non-critical value?
Why is it important to know the standard deviation for a given sample? What do researchers learn about a normal distribution from knowledge of the standard deviation?
Identify a research question from your professional life, research interests, or everyday experience that could be addressed by this analysis.
Your population mean has always been 9 customers per hour. The sample standard deviation is 4. The sample size is 25. The sample mean is 8.
An analysis of variance was used to evaluate the mean differences from a repeated-measures research study. The results were reported as F(3,24)=6.40.
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