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1. Why would a researcher have more than two levels of the independent variable in an experiment?
2. What is a factorial design? Why would a researcher use a factorial design?
3. What are main effects in a factorial design? What is an interaction?
Let An be the set of all integers greater than n. Let Bn be the collection of all subsets of {1, ..., n}. Let Tn be the collection of sets of positive integers that are either in Bn or of the form An ∪ B for some B ∈ Bn . Prove that Tn is a topol..
How many data points can she use in a regression analysis using the data provided.
In certain normal distribution of scores, mean is 50 and standard deviation is 4. Determine z-score corresponding to a score of 55.
1 sandra has three suitors and has to decide which to take to the big dance.nbsp their romance geekiness and the chance
Suppose also that the two groups have the same variance, which is estimated at about s2 ¼ 400. Find the total sample size needed if we want 99% certainty of making the right selection.
Explain the difference between testing a single mean and testing the difference between two means. What two assumptions must be met when one is using z test to test differences between two means?
question the water sports company soon will be producing and marketing a new model line of motor boats. the production
a sample of 20 items provides a sample standard deviation of 5. compute the 95 confidence interval estimate of the
according to the census bureau 3.04 people reside in the typical american household. a sample of 19 households in
What sample size is required to generate a 95% confidence interval for the mean annual real estate tax payment with a half-length of $100?
A doctor wants to estimate the HDL. How many subjects are needed to estimate the HDL within 3 points with a 99% confidence. Assuming s=13.9
the goal of any supervised learning study is to be able to predict the response very
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