Sperry 10.2

Write a response to each discussion post.

Sperry 10.2


Top of Form

The Pearson correlation is to summarize the relationship between two variables as a single number, and the coefficient of determination indicates what proportion of the variance in one of the variables is associated with the variance in the other variable. For example, I state coat sales increase with dropping temperatures. To prove this I would gather data on sales and temperatures for those days. Next, I would plot this information and would see that the linear relationship is strong. Then I would calculate the Pearson correlation and the coefficient of determination (Erford, 2015).

Linear regression tries to explain the relationship between the two variables by fitting the linear equation into observed data. The linear regression tells the strength of the effect that the independent variable have on the dependent variable. It can also be used to make predictions. Take my example of coat sales, due to global warming coat sales will slowly decrease (Erford, 2015).

Partial correlation measures association between two variables, while at the same time it controls the effects of a third variable. For example, in April there is always a spike in sales when the average temperature is 42 degrees, because the third controlled variable would the end of season sales. The Semipartial correlation removes the effects of additional variables from one of the variables that were included.

Pomajzl 10.2


Top of Form

The Pearson product-moment correlation coefficient summarizes the relationship between two variables as a single number. It is able to take values with a positive “r” indicating a positive linear relationship and values with a negative “r” indicating a negative linear relationship (Erford, p. 363). The decimal indicated the strength of the relationship, meaning the closer the absolute value of “r” to 1, the stronger the correlation is (Erford, p. 363). The easiest way to explain this and determine this is using a scatterplot. The closer the plots are to creating a straight line determines the indication of a stronger relationship.

The coefficient of determination is the square of the correlation coefficient, which indicates the ratio of the modification in one of the variables, is associated with the modification of the other variable. (Erford, p. 371).

The linear relationship between two variables can be used to predict the value between two variables (Erford, p. 375). For example, if the amount of x is used to predict the amount of y, then the amount of y is used to predict the amount of x. They rely on each other.

The elements of linear regression are the slope and intercept. The slope tells the steepness and the intercept is the predicted value of the regression line.

Partial correlation is when the effect of a third variable is removed (Erford, p. 375). Partial correlation only occurs when two variables are correlated because of the third variable in which they are both linked.

A semipartial correlation occurs when three variables have an effect on one another in some form or way however, it may not be direction. For example, ‘x’, ‘y’, ‘z’ are all in the same study. However ‘x’ and ‘y’ correlate and ‘x’ and ‘z’ correlation but, ‘y’ and ‘z’ are partialled out because they do not coordinate with one another (Erford, p. 381).

Partial correlation and semi partial correlation are similar because they both contain three variables and the one of the variables is removed in some form whether it be completely removed or just partially removed with two variables, which do not coordinate.

Bottom of Form

Bottom of Form

Bottom of Form

Bottom of Form

Calculate the price of your order

Simple Order Process

Fill in the Order Form

Share all the assignment information. Including the instructions, provided reading materials, grading rubric, number of pages, the required formatting, deadline, and your academic level. Provide any information and announcements shared by the professor. Choose your preferred writer if you have one.

Get Your Order Assigned

Once we receive your order form, we will select the best writer from our pool of experts to fit your assignment.

Share More Data if Needed

You will receive a confirmation email when a writer has been assigned your task. The writer may contact you if they need any additional information or clarifications regarding your task

Let Our Essay Writer Do Their Job

Once you entrust us with your academic task, our skilled writers embark on creating your paper entirely from the ground up. Through rigorous research and unwavering commitment to your guidelines, our experts meticulously craft every aspect of your paper. Our process ensures that your essay is not only original but also aligned with your specific requirements, making certain that the final piece surpasses your expectations.

Quality Checks and Proofreading

Upon the completion of your paper, it undergoes a meticulous review by our dedicated Quality and Proofreading department. This crucial step ensures not only the originality of the content but also its alignment with the highest academic standards. Our seasoned experts conduct thorough checks, meticulously examining every facet of your paper, including grammar, structure, coherence, and proper citation. This comprehensive review process guarantees that the final product you receive not only meets our stringent quality benchmarks but also reflects your dedication to academic excellence.

Review and Download the Final Draft

If you find that any part of the paper does not meet the initial instructions, send it back to us with your feedback, and we will make the necessary adjustments.