Since sample a has data more tightly clustered about the mean compared to sample b, we can say that the variance for sample a is lower than that for sample b.
What is variance:
Variability gets used to measure the central tendency's closeness to the values. A measure of central tendency that can get used is mean. Mean refers to the average for some given values and gets determined by dividing the sum of those values by the number of values. The variance refers to the average squared difference of each value from the mean.
When the variance is lower, the data is less spread out. Thus, data being more tightly clustered about the mean reflects lower variance. Since sample a has data more tightly clustered about the mean compared to sample b, it can be concluded that the variance for sample a is lower than that for sample b.
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ROM will show the patient that movement still is possible
Active and passive ROM maintain function of body parts
Movement facilitates mobilization of leaked exudates back into the vascular bed
<h3>What is ROM ?</h3>
A physical therapist may employ ROM as a therapeutic method to improve joint flexibility and regain lost joint mobility. ROM enhances joint surface lubrication as well. If there is a restriction in joint range of motion, ROM is used. enhancing joint ROM improves joint flexibility, joint function, and discomfort.
- When a joint is being exercised passively, it is entirely relaxed while an external force moves the body part through its range of motion. Active range of motion (ROM) is the range of motion that a joint can make totally on its own. Active ROM involves movement that is not aided by an external force.
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