Dr. Green examines the effect of cognitive coping training on stress levels. She randomly assigns half of her sample to training in which they are taught to calm themselves down by thinking optimistically, and by making positive statement to themselves. The other half of the sample are not given the cognitive coping training. A survey is used to assess the stress levels of the study participants. What is her independent variable?

The correct answer is B. Cognitive coping training

Explanation:

In a research study or experiment, the independent variable can be identified by answering questions such as what is the variable the researcher manipulates? or which variable is expected to affect another?. In Dr. Green's study, the factor she is manipulating is cognitive coping training because half of the participants are exposed to this training, and the other half are not exposed.

Also, the purpose of this study is to "examine the effect of cognitive coping training on stress levels", which shows cognitive coping training is independent as this is not affected by other variables and it is expected it affects the second variable or stress level. According to this, her independent variable is cognitive coping training.

pentagon

step-by-step explanation:

the coordinates   a(5, -2), b(3,-1),c(-4,-4) d(-3,8) and e(-1,4) forms the vertices of the polygon when they are connected in order.

in order to classify that which polygon is it with the given coordinates, first count the number of vertices and then count the number of sides it can make with these vertices.

since, the given coordinates have five vertices, therefore, it will make five sides. moreover, pentagon is regular in nature therefore it will be convex.

now, a polygon with five sides is known as pentagon, therefore, the given polygon is the pentagon.