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Bring to mind a real-world situation or problem that could be addressed using an independent- or related-samples t test. You will not need SPSS to complete this Discussion question.
For this situation or problem:
Clearly identify the independent and dependent variables you would study.
Determine whether an independent-samples or related-samples t test is most appropriate and why.
Generate the statistical null and alternative hypotheses.
Describe what information the effect size would tell you that the probability value would not tell you.
Using realistic numbers for values of degrees of freedom, sample size, and t statistic, report hypothetical results in a few sentences using correct APA format.
Using alpha = 0.05 and a computed value of +4.49, can we conclude that the percentage of claims for married policyholders is less then for single policyholders?
Let's say I have a new drug that I think helps diabetics. So I perform clinical trials in accordance with the FDA requirements. I give one randomly selected groups of diabetics the drug, and another sample gets a placebo pill.
Cars pass a certain street location according to a Poisson process with rate λ. A woman who want to cross the street at that location waits until she can see that no cars will come by in the next T time units.
Given your answer to part a and a stated interest rate of 9 percent on the total amount borrowed, what is the effective rate on $400,000 actually being used?
What is the difference between the R and R-squared terms? What does each tell you? How large should the R-squared term be if you want to show that the two variables are practically related?
Randomly selected statistics students were given five seconds to estimate the value of a product of numbers with a summary of the results of both groups given below.
What is the chance? students over age 21 students under age 21 Why is your sample not an SRS? These combinations of students have equal chances of being interviewed.
A survey of the opinions of property owners about a street widening project was taken to determine whether the resulting opinion was related to the distance of front footage.
Assume that the mean useful life of a particular lightbulb is 2,000 hours and is normally distributed with a standard deviation of 300 hours. Determine the percentage of lightbulbs that will last 2,300 hours or longer.
A random sample has been taken from a normal distribution and the following confidence intervals constructed using the same data: (38.02, 61.98) and (39.95, 60.05). What is the value of the sample mean?
By using a level of significance of .10, is there evidence that the population mean weight of the candy bars is greater than 4.3?
Using the .02 level of significance, conduct a five-step hypothesis testing procedure to determine if the new processes significantly reduced the wait time.
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