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If you want to be 95% confident of estimating the population proportion to within a sample error of +and - .05 and there is historical evidence that the population is approximately .35, what sample size is needed.
A two-way ANOVA model was used to analyze an experiment with two levels of one factor, three levels of a second factor, and 6 observations per treatment combination.
What is an appropriate sample space for this experiment?
Senator Hayes is considering a a run for the U.S. presidency, but she is only 35 years of age, which is the minimum required age. While investigating this issue, she finds the ages of past presidents when they were inaugurated
Finding the probability of sample and describe the sampling distribution of the sample means.
Suppose the organizers of the study are reconsidering their sample-size estimate. How many participants should be enrolled in each of the active and control intervention groups to achieve 80% power if a two-sided test is used with α = .05
When performing a 2-way ANOVA with replication you must first: A) Perform an interaction hypothesis test B) Take out the error because you ran replicates and error makes no sense with replicates
Explain why it might be important to look at cancer incidence that is age-adjusted rather than just cancer incidence. Perform simple linear regression on these data and report your finding.
In 1851 there were 25,466 nurses in Great Britain. Find the probability that a British nurse selected at random in 1851 would be 60 years or older. (My guess is The sum of the percent of nurses 60 years are older are added equaling 36% or 1967.76/2..
The hypothesis is to be tested at the 5% level of significance. The critical value from the table equals:
You are dealt 2 cards successively without replacement from a shuffled deck of 52 cards. Find the probability that the first card is a king and the second card is a queen.
A random group of apartments was selected from a city to analize the number of bedrooms they have. Is there evidence to reject the hypothesis that the apartments are equally distributed between 1 bedroom, 2 bedroom, and 3 bedroom apartments, at al..
Compute the variance and standard deviation
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