A correlation measures and describes the linear relationship between two variables. The relationship is described using a +/- and a numerical value. Define what each indicates about the relationship. Give an example of two variables that seem to be related, and thus have a correlation, but have nothing to do with each other.
Go to and find two correlations and evaluate the significance. Discuss the strengths and weaknesses of correlational studies you examined. Discuss concepts such as positive and negative correlation, correlation coefficients, and causality specifically with the correlational output evaluated.
75 Word reply Hello Class, the following are my thoughts on the criteria needed to identify the critical region and how to decide to utilize a one-tailed vs a two-tailed test. As the textbook states, the purpose behind stage two is to set the criteria for making a decision on the hypothesis, which is … Read more
Reply WK 4 DQ 2 VT Topic 4 DQ 2 To Set the Criteria for the Decision (step 2 in hypothesis testing) we must identify the critical value and the rejection region. What information do you need to set the criteria? Determining the critical region which will yield results sufficient to reject the null hypothesis … Read more
Reply 75 words Hello Class, the following are my thoughts on the purpose behind hypothesis testing and the steps to follow for conducting a hypothesis test as they relate to current events. As the textbook describes, although researchers wish to research entire populations, it is often impossible for them to do so. This impossibility is … Read more
75 Word Reply This is a great explanation of Type I error vs a Type II error. Why do you think it is important to avoid making one of these errors? How do you think it could affect a population if one of these errors did occur and went undetected? Type I error: A … Read more
Identify the top three concepts or skills you learned in this course that you believe will be the most useful to you in your current or future professional career or education along with rationale as to their importance to someone in the field of business statistics. Also, provide at least one specific example to support … Read more
This week, the first part of your small research project is due. In order to make this project as educational as possible, it helps if you have lots of input before submitting. There is an IMPORTANT attachment to this message. Be sure to download and read it and ask questions. Please submit your hypothesis and … Read more
Multiple Regression Analysis Amazon.com has become one of the most successful online merchants. Two measures of its success are sales and net income/loss figures. The data can be found in the file, . Use Excel to complete the following: Construct a scatter plot for Amazon’s net income/loss and sales figures for the period 19952015. … Read more
Multiple Regression Analysis Amazon.com has become one of the most successful online merchants. Two measures of its success are sales and net income/loss figures. The data can be found in the file, . Use Excel to complete the following: 1. Construct a scatter plot for Amazon’s net income/loss and sales figures for the period … Read more