In your own words, answer this unit’s discussion questions in a main post (recommended minimum 300 words), and respond to at least two peers’ postings (recommended minimum 75 words).

After you have reviewed the Assignment Details below, click the Discussion Board link under the My Work heading above to open the Discussion Board and make your post.

Assignment Details

Predicting the probability of achieving the desired results often involves the comparison of two groups. For example, politicians would like to know who is more likely to vote for them, and they will compare the data of potential voters: younger and older, males and females, urban and rural, and so on. Similarly, employees would like to know whether their salary depends more on experience or level of education. Hence, hypothesis testing with two samples may be of great value. In addition, statisticians often make better predictions if they know whether one variable is related to the other. That is, when comparing two variables and attempting to see whether there is a relationship between them, analysts will try to determine whether changes made to one variable trigger corresponding changes in the other variable.

Describe the purpose of scatter diagrams, and discuss how you would determine whether positive, negative, or no correlation exists between two variables by looking at the scatter diagram.

Reply to comments posted by two of your classmates or your professor. Comments must be substantive and related to learning topics discussed in the Learning Materials.

In your own words, please post a response to the Discussion Board and comment on other postings. You will be graded on the quality of your postings.

For assistance with your assignment, please use your text, Web resources, and all course materials.

Discussion Board Reminders: 

Must have three posts:  A main post and two replies to peers.

First post: Either your main post or a reply to others must be posted before midnight CT (Central time) on Friday of each week.

Second and third post: Must be posted on a different day from the first post.

Connect to content: At least one post must refer to course learning materials. See the Academic Resource on Discussion Boards for help with connecting to the content.

Engaging in class discussions: For more information on making the most of your class dialog, review the Academic Resource on Discussion Boards.