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Illegal guns.
A study by the U.S. Bureau of Alcohol, Tobacco, and Firearms (BATF) (USA Today, 22 June 2000) surveyed 1530 investigations by the U.S. BATF into illegal gun trafficking from July 1996 through December 1998. The study reports the portion of cases that were the result of each of five gun-trafficking violations:46% Straw purchase (legal gun buyer acting on behalf of an illegal buyer)21% Unlicensed sellers14% Gun shows and flea markets14% Stolen from federally licensed dealers10% Stolen from residences
a) State the W s for this study to the extent that the story gives them.
b) What do you notice about the percentages listed? What does that probably mean?
c) Make a bar chart to display these results, and label it correctly.
A computer system uses passwords constructed from the 26 letters (a to z) or 10 integers (0 to 9). Suppose there are 10000 users on the system with unique passwords. A hacker randomly selects (with replacement) passwords from the potential set.
Determine the population and sampling frame for each of the following: (a) The local public library wants to conduct a customer satisfaction survey.
The researcher would like to create another regression model and use data from people who are currently students - In simple Ordinary Least Squares regression, the fitted line must always go through a particular point, which is found from the x and ..
The operation manager at a tire manufacturing company believes that the mean mileage of a tire is 20,138 miles. With a variance of 10,304,100. What is the probability that the sample mean would be less than 19,448 miles in a sample of 171 tires if..
Compute the test statistic. At 95% confidence using the p-value approach, test to see if taking the course actually increased scores on the driving exam.
a box of 10 gloves contains three left-handed gloves and seven right-handed gloves. complete parts a through d.a. if
The next day, Elle visited an attorney to begin divorce proceedings. Aftersome small talk, the attorney, Mark Smithson, asked Elle about the major assets accumulated during the marriage.
In a test of the effectiveness of a new battery design, 16 battery-powered music boxes are randomly provided with either the old design or the new version. Hours of playing time before battery failure were as follows:
Explain the difference between testing a single mean and testing the difference between two means. What two assumptions must be met when one is using z test to test differences between two means?
the following probability distribution represents the number of people living in a household x and the probability of
What is the z-value that was used in the computation. Round your z-value to 2 decimal places and difference in the mean carbohydrate content between the Corn Chip and Potato Chip groups.
gerald needs to purchase baseballs and bats for his youth baseball league. he will need at least 25 pieces of equipment
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