Welcome

## magine that a professor of sociology has two teaching assistants (TAs) who will help him grade assignments for the duration of the semester. The professor wants to make sure that he and the TAs are well calibrated with one another, so he has all three of them grade the first assignment independently. Because the professor grades every assignment on a curve, he first converts the students’ scores to z-scores for each grader. The following table shows the z-scores for a population of 10 students in his class for each grader.   Professor Teaching Assistant #1 Teaching Assistant #2 Student 1 1.43 1.05 0.39 Student 2 -0.57 -1.33 0.87 Student 3 0.35 0.27 -0.94 Student 4 0.72 0.90 2.24 Student 5 -1.41 -1.23 -0.50 Student 6 0.10 0.27 0.56 Student 7 -2.04 -1.71 -0.94 Student 8 0.76 1.19 0.03 Student 9 0.47 0.56 -0.50 Student 10 0.18 0.03 -1.21   The professor is going to use the z-scores to calculate the correlation coefficient between his scores and those of his TAs. To calculate the correlation coefficient, he sums the products of the z-scores. The professor should divide this sum by     .

magine that a professor of sociology has two teaching assistants (TAs) who will help him grade assignments for the duration of the semester. The professor wants to make sure that he and the TAs are well calibrated with one another, so he has all three of them grade the first assignment independently. Because the professor grades every assignment on a curve, he first converts the students’ scores to z-scores for each grader. The following table shows the z-scores for a population of 10 students in his class for each grader.

Professor
Teaching Assistant #1
Teaching Assistant #2
Student 1 1.43 1.05 0.39
Student 2 -0.57 -1.33 0.87
Student 3 0.35 0.27 -0.94
Student 4 0.72 0.90 2.24
Student 5 -1.41 -1.23 -0.50
Student 6 0.10 0.27 0.56
Student 7 -2.04 -1.71 -0.94
Student 8 0.76 1.19 0.03
Student 9 0.47 0.56 -0.50
Student 10 0.18 0.03 -1.21

The professor is going to use the z-scores to calculate the correlation coefficient between his scores and those of his TAs. To calculate the correlation coefficient, he sums the products of the z-scores. The professor should divide this sum by     .

The professor constructed a table of correlation coefficients between his scores and those of his TAs. Select the correct missing correlation.

Professor
Teaching Assistant #1
Teaching Assistant #1      1
Teaching Assistant #2 0.36 0.31

Based on the correlation table, the professor should arrive at which of the following conclusions?
The professor and both of his TAs are well calibrated.

The two TAs are well calibrated with each other but not with the professor.

The professor and TA #1 are well calibrated, but TA #2 is off.

The professor and TA #2 are well calibrated, but TA #1 is off.

The professor thinks TA #1 may be too generous in her grading and decides to subtract 2 points from each student’s grade from TA #1 before converting the scores to z-scores and computing the Pearson correlation coefficient between her grades, the professor’s grades, and those of TA #2. This change in the TA #1’s scores will      the correlation between the TA #1’s scores and the professor’s and TA #2’s scores.
Tired of numerous paper assignments?
Rely on us and receive professional paper writing assistance!

## Who We Are

We are a professional website for customized writing. If you searched a question and stumbled into our website, you are in the right place to receive assistance with your coursework.

## Do you handle any type of coursework?

Yes. We have displayed prior orders to demonstrate our experience. We can answer this question for you as we have previously. Please fill out our Order Form so that we may ensure its flawlessness. Correctly completing the order form will help our staff with reference, requirements, and future communication.

## Is it hard to Place an Order?

1. Click on the “Order Now” tab at the top menu or “GET A FREE QUOTE” icon at the bottom and a new page will appear with an order form to be filled
2. Fill in the initial requirements in the small order form located on the home page and press “continue” button to proceed to the main order form or press “order” button in the header menu. Starting from there let our system intuitively guide you through all steps of ordering process. Submit detailed paper instructions, upload necessary files if needed and provide your contact information – you are almost done!
3. Proceed with the payment- click on “PROCEED TO CHECKOUT” at the bottom of the page. From there, the payment sections will show, follow the guided payment process and your order will be available for our writing team to work on it. All your payments are processed securely through PayPal. This enables us to guarantee a 100% security of your funds and process payments swiftly.
4. Delivery- Once finished, your final paper will be available for download through your personal dashboard. You will also receive an email notification with a copy of your paper attached to it.