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1. The total variance in a set of scores can be partitioned into two components. What are they, and how do they differ?
2. What are some factors that contribute to error variance in a set of data?
3. Generally, do researchers want systematic variance to be large or small? Explain.
A drama fan has taped 9 episodes (on nine different videotapes)of a drama. however, he only has time to watch four episodes. suppose he selects four tapes at random. How many different ordered arrangements of episodes are possible?
you are an engineer for bulbs lsquor us and youve developed a lightbulb that you claim consumes less than 5 watts per
Find the area to the right of z = 0.85 under the standard normal curve.
(Proof of a Weaker Version of the Duality Theorem) Show that if the primal problem is feasible and the intervals Xij are compact, then the optimal primal and dual costs are equal (even though the dual problem may not have an optimal solution)
In a study of smokers who tried to quit smoking with nicotine patch therapy, 39 were smoking one year after the treatment, and 32 were not smoking one year after the treatment.
the acme bacon company distributes bacon in packages labelled 500 grams. an inspector randomly selects 49 of these
You have ordered 10 bags of cement, which are supposed to weigh 94 kg each. The average weight of the 10 bags is 93.5 kg. Calculate the condence interval in R, and write the code you used
What is the variance of the expected demand in b) above? The investigator believes that the true slope of the relationship is 5. Do the data tend to confirm or deny this hypothesis?
for a t random variable with 5 degrees of freedom find a such that pt gt a .975. answer to three decimal places and
Five have a 3/10,000 chance for failure. Four have a 4/10,000 chance for failure. One componet has a 1/100 chance for failur. What is the overall reliability of the product?
At the .05 significance level, can Macaray conclude that the population means are different? Note that you should show all 5 steps in the test of hypothesis.
If possible, determine a 95% confidence interval for average number of television sets in all 50,000 households. If this is not possible, describe why not.
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