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Evaluate completely the following statement: "The issue is not whether there is variation, but whether the variation is significant". Be specific with data types. Your answer should include an understanding of statistical confidence and the null hypothesis.
After treatment is administered to individuals in sample, sample mean is found to be M = 55. Determine Cohen's d measure effect size for both tests (σ = 20 and σ = 10).
A random sample of 80 voters found that 44% were going to vote for a certain candidate. Find the 90% limit for the population proportion of voters who will vote for that candidate?
three machines i ii and iii manufacture 30 30 and 40 respectively of the total output of certain items. of them 43 and
What is the likelihood that none of the selected flights arrived within fifteen minutes of scheduled time?
Determine whether the sampling method is independent or dependent for the following example. A researcher wants to know whether the newly issued "state" quarters have a mean weight that is different from "traditional" quarters.
Would the mean, median, or mode of the prices of recent home sales be the best measure of central tendency and why?
a population is estimated to have a standard deviation of 10. we want to estimate the population mean within 2 with a
Is there sufficient data to determine that these student data reflect population data? Determine using alpha .05 as critical value.
Provide an example of how you could/would apply a hypothesis test using Chi Square. State the null and alternate hypotheses. You do not need to complete the entire five step process using actual numbers.
Using a .05 level of significance, test whether the sample results indicate that the manufacturing process is functioning properly.
How would you interpret the findings of a correlation study that reported a linear correlation coefficient of +0.3?
The number of runs with respect to the sample median is:
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