In psychology lab, tetiana is conducting an experiment on depth perception using the howard-dolman box. inside the box are two vertical rods and a horizontal ruler. the participant manipulates the rods until they appear to be aligned at the same distance away, then the experimenter measures how far out of alignment they are. there are three conditions: left eye only, right eye only, and both eyes. tetiana is using a repeated-measures design. how is the independent variable being manipulated in tetiana's design?

within-groups

Step-by-step explanation:

According to my research on the scientific method, I can say that based on the information provided within the question the independent variable is being manipulated within groups, because she is not using a pretest and her design is within-groups. This is because she is using the posttest-only control group design which is a research design where at least two groups, one of which does not receive a treatment or intervention, and data is collected on the outcome measure after the treatment or intervention.

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the required function is .

step-by-step explanation:

from the given table it is noticed that the graph passing through (-3,7), (0,4), (3,1) and (8,-4).

it is a linear function because the value of y is decrease by one as the value of x increase by 1.

the slope of the function is

the slope of the function is -1 and the y-intercept is 4.

the slope intercept form is

where, m is slope and b is y-intercept.

therefore the required function is . the graph of this function is shown below.