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Describe a fictional two-group experiment that could be tested with an independent t-test but violates the assumption required for homogeneity of variance. Explain what the researcher could have done to avoid this problem
The number of passengers on the Carnival Sensation during one-week cruises in the Caribbean follows the normal distribution.
the number of customers arriving at the checkout counter in a department store during a one hour period is a poisson
question a race pilots average rate of speed over a 720-mi course is inversely proportional to the time in minutes t
A shipping form keeps 2 cars in readiness for local delivery. Because of demands on their time and the frequency of mechanical failure, the probability that a particular car will be available when needed is 0.9.
Using a level of significance of .01, is there evidence that the first year female high school teachers are receiving lower salaries? Fully explain your answer.
Bob Billy is an operations analyst for Dollar-Does-It stores based in Iva, SC. He is currently studying the order and stocking policies for top-selling toy.
Paired samples t-test for the given data - financial advice from the voluntary organization - A local voluntary organization affiliated to the Citizens Advice Bureau offers free financial advice to residents in the area who are registered debtors
Consider testing H0: μ= 27 vs Ha: μ
in a representative sample of 1000 adult americans only 480 could name at least one justice who is currently serving on
Normal distribution with a mean value of 150 sec and a standard deviation of 20 sec. The fastest 10% are to be given advanced training. What task times qualify individuals for such training?
Want a sample size of about 60 (30 controls and 30 cases). At 5% significance and 80% power.How do i determine the standard deviation and mean difference.And how do i arrive at the 60? my study design is case-control.
John conducted his study to measure self-esteem among victims of domestic violence before and after they complete an 8-week program for abuse victims with 10 individuals. He calculated t = 1.9 from his data.
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