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Question: A company's market share is very sensitive to both its level of advertising and the levels of its competitors' advertising. A firm known to have a 56% market share wants to test whether this value is still valid in view of recent advertising campaigns of its competitors and its own increased level of advertising. A random sample of 500 consumers reveals that 298 use the company's product. Is there evidence to conclude that the company's market share is no longer 56%, at the 0.01 level of significance?
For each lettered part, a through c, examine the two given sets of numbers. Without doing any calculations, decide which set has the larger standard deviation and explain why.
Gestational Age (Gestage, weeks) for sample of 100 low birth weight infants, and output from fitting a simple linear regression model to data, regressing Headcirc (Y) on Gestage (X).
list three measures one can take to increase the power of an experiment. explain why your measures result in greater
If λ= 0.45 and µ = 0.55 how many packets the buffer needs to hold to have a drop rate smaller than 10-6 (one packet dropped for every million packets handled) What is the probability of buffer overflow?
I need to collect both primary and secondary data regarding the research issue on salary of baseball players. (the aim of this research is to verify whether the salary of the baseball players varies with respect to the state)
Present the estimated model. Give an interpretation of the coefficient of determination (r2). List the adjusted r2. Use the F-test to test the validity of the model as a whole at a 5% level of significance.
Design an experiment to test the hypothesis that single-gender math classes are beneficial to adolescent females. Construct operational definitions of both the independent and dependent variables.
if two televisions are randomly selected, compute the probability that both televisions work. what is the probability that at least one does not work?
A packaging company distributes quarter-pound beef patties to local fast-food restaurants. The restaurants demand the weights to be 4 plus or minus .02 ounces.
Compute the effect size for each of the following average SAT math scores. Remember SAT math is standardized such that u= 500 and standard deviation =100.
Unexposed women comprising a contro group. at the 0.01 level of significance, was the incidence of cancer greater in the DES users?
The average chain length of a polymer produced in a batch reactor is given as 200 units, where chain length itself is known to be a geometric random variable. What fraction of the polymer product is expected to have chains longer than 200 unit..
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