A friend of yours, a senior, took the Graduate Record Exam in September and scored in the 99th percentile. In February, your friend took the same exam over again. This time your friend scored in the 84th percentile. As a research methods student, you told your friend that his/her lowered score was most likely due to:.
a. testing.
b. differential selection.
c. statistical regression.
d. demoralization.
e. compensation rivalry.

Option c          

Explanation:

Regression analysis refers to the collection of statistical procedures used in statistical modelling to estimate the associations between such a predictor variables as well as one or even more independent factors.

The most popular type of regression evaluation is dynamic regression, where a researcher seeks the lines that matches the information most appropriately according to a particular mathematical criterion.

Regression processing has been used mainly for two reasons which are functionally different. First, regression analytics is commonly used only for estimation and predicting, where its utilization has a considerable overlap with artificial intelligence field.                  

can you explain it better

d.

thist title points out that you are explaining the nature of the u.s. government. it is the most specific. a representative government consists of a government where decisions are taken according to a voting system. the most essential aspect of a representative government is found in the different structures where voting rights are granted to different groups of people. for example, voting for governor, mayor, president, local police chief etc.