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A sample of 1500 men, ages 18-64, was randomly chosen from the population of a large metropolitan area. The researcher wanted to investigate the influence of diet, specifically the role of saturated fat in the diet, on the development of a myocardial infarction (heart attack).
Myocardial InfarctionStimulus Variable Yes No TotalHigh Saturated Fat Diet ( >30% of daily calories from saturated fat) 600 100 700Low Saturated Fat Diet (<30% of daily calories from saturated fat) 100 700 800Total 700 800 1500
1. What is the sample and population in this study?
2. What are the variables in this study?
What is the p-value associated with the sample results? What is your conclusion based on the p- value?
The article claims that the distributions of annual returns for both common stocks and long-term government bonds are bell-shaped and approximately symmetric. Assume that these distributions are distributed as normal random variables with the mea..
There are 4000 mangoes in a shipment. It is found that it a mean weight of 15 ounces with a standard deviation of 2 ounces.
Mr. James McWhinney, president of Daniel-James Financial Services, believes there is a relationship between the number of client contacts and the dollar amount of sales.
Based on responses from 1,015 randomly selected teens, which concluded that 44% of teens say grades are the greatest source of pressure, test the claim that fewer than half of all teens in the population feel that grades are the greatest source of..
Provide an example of a hypothesis test you could perform at work or at home. State what the Null and the Alternative hypotheses would be in your test.
The Bureau of Labor Statistics reported that the average annual income of dentists in the year 2005 was $110,000. A sample of 81 dentists, which was taken in 2006,
The amount ($1.00, $5.00, $10.00, $25.00, or $50.00) promised to each person was determined by randomization. For each person who was sent one of the surveys, The value of the X2 test statistic for testing the hypothesis
Find would be answer to part(a) if there were only single server which can serve customers twice as fast (i.e, with service rate four customers per hour)?
A bookcase contains 3 statistics books and 4 biology books. If 2 books are chosen at random, find the chance that both are statistics books.
Set up hypotheses to test if distribution of birthdays can be considered coming from uniform distribution.
Given the following data, create a scatter diagram (using Excel), click on the points as demonstrated in the Excel workbook, and have Excel place the regression equation and coefficient of correlation on the graph for you. Interpret the results (i..
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