Question

1.) Determine the percentile ranks of the following Z scores.  Another way to look at this is to determine what percentage of scores are higher than the posted scores.

Answers must be listed as percentages, not proportions. Answers should also be using two decimal places unless the percentage is a whole number (i.e., a percentage of 40.00 can simply be written as 40, but if it was, say, 40.13% you would want to enter 40.13).

- Z score of 1.5

- Z score of 3.0

- Z score of -.75

- Z score of -1.5

2.) Overall math scores in the campus population have a mean of 80, a standard deviation of 10 and are normally distributed.

Overall biology scores in the campus population have a mean of 75, a standard deviation of 15 and are normally distributed.

Whose score was higher--Shira's math score of 90, or Sophia's biology score of 90?

3.) Assign a proper numeric value of Pearson's r to the stated association. In your response, also provide an example of two actual variables which demonstrate this association:

Strong positive correlation.

Explain how you determined your answer.

4.) Assign a proper numeric value of Pearson's r to the stated association. In your response, also provide an example of two actual variables which demonstrate this association:

No correlation.

5.) Assign a proper numeric value of Pearson's r to the stated association. In your response, also provide an example of two actual variables which demonstrate this association:

Weak to moderate negative correlation.

Answer 1