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Question:
For each of the following examples, identify the independent and dependent variables and indicate whether the research involves the use of descriptive or inferential statistics. Justify your answer.
(a) A researcher wants to determine how the Gross Domestic Product (GDP) affects the number of unemployed people in Canada.
(b) Researchers are trying to understand whether students' opinions about the quality of food at the cafeteria varies with their ages based on results from a sample of 100 students.
(c) A researcher is trying to figure out if the incidence of breast cancer in Alberta is influenced by CO2 emissions from the oil sands.
(d) A researcher is conducting a study to determine if men and women rate the quality of a new automobile differently, gathered from 1,000 new buyers.
(e) University administrators want to know whether average GPAs differ across student majors (e.g., sociology, math, or history) based on total student records at the U of A.
At the .05 level, you are testing whether there is a significant difference in the proportions of college students and similar aged non college students having accidents during the two year period. Is this a 1 or 2 tail test?
You took a sample of your expenses for 20 weeks and found that the average is $285 and the standard deviation for the sample is $25. Set up your null and alternative hypothesis for testing whether your cists are different and do the analysis using..
An oil prospector will drill a succession of holes in a given area to find a productive well. The probability that he is successful on a given trial is .2. What is the probability that the third hole drilled is the first to yield a productive well?
Formulate a linear programming model
Market researchers use it by correlating product attribute ratings with a dependent measure such as overall satisfaction. They then rank the product attributes to determine which attributes are the most important. They call this Key Driver Analysi..
the professor teaching a large introductory class gives a final exam that has alternate forms a b and c. a student
Some peaceful revolutions are episodes that erupt in violence. Therefore, some episodes that do not erupt in violence are non-peaceful revolutions.
Carry out a survey to estimate a proportion in a population of your choice. Examples include the proportion of vehicles with only one occupant and the proportion of a university campus covered by tree canopy.
Yearly automobile inspections are required for residents of the state of Pennsylvania. Suppose that 18% of all inspected cars in Pennsylvania have problems.
Mark is using the modified internal rate of return (MIRR) when evaluating investment opportunities. He is able to reinvest cash flows received from the investme
Write a 90% confidence interval for the mean daily income this parking garage will generate. Interpret this confidence interval in context.
In a certain class, 21% of the students are left-handed. Suppose that a random sample of 66 students is selected. Find the mean number of left-handed students.
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