Homework Unit Five Statistics for Criminal Justice -1 CCJ 5704 By Edward M. Hobbs March 24, 2012 1.Explain the least-squares regression line. If a scatter plot shows a linear relationship between two quantitative variables, least-squares regression is a method for finding a line that summarizes the relationship between the two variables, at least within the domain of the explanatory variable, x.The
Answer: False Difficulty: Medium 5. The sampling distribution of a sample statistic is the probability distribution of the population of all possible values of the sample statistic. Answer: True Difficulty: Easy 6. A sample statistic is an unbiased point estimate of a population parameter if the mean of the populations of all possible values of the sample statistic equals the population parameter. Answer: True Difficulty: Medium 7.
The core module that provides all of the Windows 7 capability that isn't language- or edition-specific is called the MinWin module. 3. When you copy a file to a library, Windows Explorer writes the file to the folder designated as the save location. 4. To use federated search, you must download or create XML files for specific sites called search connectors.
EXERCISE 24 Questions to be Graded 1. What is the r value listed for the relationship between variables 4 and 9? r = -0.32 2. Describe the correlation r = −0.32** using words. Is this a statistically significant correlation?
It displays the name of the directory that appears in the View pane. It can be displayed either iconic or texual. g, Nautilus – Is a browser tool. This component gives you two ways to work with files: the traditional File Browser view and the Spatial view, which is the default view with Fedora/RHEL h, Workspace – This is a subdivision of the desktop and how it is displayed. It can hold up to four displays, i, Workspace switcher
The alternative hypothesis H1 is that the mean annual income μ is less than $50,000. H1:μ < $50,000 Significance level chosen is 5% or α = 0.05 Here, the population standard deviation is unknown. Hence, we use a t statistic Therefore the test statistic used is t = X-μS/n follows a t distribution with n-1 degrees of freedom From the t table corresponding to 0.05 probability, the critical value tα =1.6766. Hence the critical region is t < -1.6766. Alternatively, we reject the null hypothesis, if the p value is less than the significance level Substituting the value we get t = 43.74-5014.6396/50 = -3.02 The p value corresponding to t = -3.02 and 49 d.f.
Which program allows you to stop a running process? C. Task Manager 8. Which program is used to determine what process is using a file? D. Resource Monitor 9. Which of the following is used to group multiple performance counters so that they can be used over and over in Performance Monitor?
* *Part 1 * * Design, implement, test, and debug a program with a JFrame that allows the user to enter * a series of contacts’ names, ages, e-mail addresses, and cell phone numbers, and creates * a file from the entered data. Validate the age entry to ensure that it is numeric and * between 0 and 120. Include information for three to five contacts. * * Part 2 * * Design, implement, test, and debug a program that reads the file you created by the list * in Part 1 and displays the records in a JFrame. You may either display all entries in * the list at once or display them one at a time; the user interface is up to you.
(b) If P(A) = 0.4 , P(B) = 0.5, and A and B are disjoint, then P(A AND B) = 0.9. (c) Assume X follows a continuous distribution which is symmetric about 0. If , then . (d) A 95% confidence interval is wider than a 90% confidence interval of the same parameter. (e) In a right-tailed test, the value of the test statistic is 1.5.
With the case of 90, 60, 30 and 90, 45, 45, the angles are relative to the sin of its value on the unit circle. For an example, the sin of 30 degree is ½ and the sin of 60 degree is radical 3 over 2. Same with the special right triangle of 90, 45, 45, the sin of 45 is radical 2 over 2. * Suppose that you did not have the unit circle on Circle A, but rather a circle of radius 5. Will the angle measures in degrees and/or radians change?