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When is a permutation test valid? You want to test the equality of the means of two populations. Sketch density curves for two populations for which
(a) a permutation test is valid but a t test is not.
(b) both permutation and t tests are valid.
(c) a t test is valid but a permutation test is not.
The owner of Maumee Ford-Mercury wants to study the relationship between the age of a car and its selling price. Listed below is a random sample of 12 used cars sold at the dealership during the last year.
Discuss the properties of a normal distribution. Why are there infinite possible normal distributions? Why should one assume that sample data represents a population distribution?
it has been recorded that 10 people get killed by shark attack every year. what is the probability of having 5 or 6
Suppose that the student just found out that she passed the CPA examination. What is the probability that she will be offered a job?
a pharmaceutical company receives large shipments of aspirin tablets. the acceptance sampling plan is to randomly
Find a 99% confidence interval for the difference in the two proportions,Pw - Pe , where Pw is the proportion of errors using written prescriptions and Pe is the proportion of errors using e-prescriptions.
How many standard deviations from the mean would a steer weighing 1000 pounds be?- Which would be more unusual, a steer weighing 1000 pounds or one weighing 1250 pounds?
a) Is this an upper tail, lower tail, or two-tail test? b) Are we testing means or proportions? c) State the rule of rejection (in terms of p-value and level of significance)
Create a Venn Diagram using Microsoft Word that shows the differences and similarities between qualitative research designs and quantitative research designs. This is in regards to the educational setting.
A marketing survey involves product recognition in New York and California. Of 600 New Yorkers surveyed, 195 knew the product while 150 out of 614 Californians knew the product.
What is difference between multiple regression and linear regression in bullet points?
Study have in distinguishing between case-fatality rates in 1990 and 2000-2005 if a two-sided test with significance level .05 is planned? B. How large a sample is needed in the previous problem to achieve 90% power?
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