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Q1) State meat inspector in Iowa has been given assignment of evaluating mean net weight of packages of ground chuck labelled "3 pounds." Of course, he realizes that weights cannot be precisely 3 pounds. Sample of 36 packages reveals mean weight to be 3.01 pounds, with standard deviation of 0.03 pounds.
a) What is the estimated population mean?
b) Find out a 95% confidence interval for population mean.
2) What is sampling error? Could value of sampling error be zero? If it were zero, what would this mean?
3) Write down the reasons for sampling. Provide example of each reason for sampling.
Nine percent of undergraduate students carry credit card balances greater than $7000. Presume 10 undergraduate students are selected randomly to be interviewed about credit card usage.
Describe the factors that might cause variation in weight of Tootsie Rolls during manufacture.
An independent financial advisor claims an average rate of return, μ, on a particular investment is at least 7%. In testing her claim, the correct pair of hypotheses is:
Suppose these data represent whole population. Determine the population mean and population standard deviation.
If the basket ball player is a 74% free throw shooter, then, on average, how many free throws will he or she make in a game with eight free throw attempts?
Report descriptive statistics, assumptions tests, effect sizes (partial eta) as well as tests of statistical significance.
Solve different inventory control problems using an appropriate OR method.
Utilize a test of the difference among proportions when answering these questions. Illustrate the research hypothesis.
A random sample of students is selected, and each one is asked to try first brand A and then brand B, or vice versa with the order determined at random.
a) Find the marginal density of Y. b) Find E(X) HINT: What is E (X|Y=y) ?
The 'interaction effect' was also important. By using the means in the table above write a statement explaining how the anti-anxiety drug appears to affect anxiety. Are the outcomes consistent with the hypothesis proposed by the researchers?
Five test vehicles of each kind were crashed, with results given below. Research question: Are mean crash damages the same for these 3 vehicles?
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