# Question: Why Is Variability Necessary And Where Does It Come From?

## What is the most common measure of variability?

standard deviationResearchers value this sensitivity because it allows them to describe the variability in their data more precisely.

The most common measure of variability is the standard deviation.

The standard deviation tells you the typical, or standard, distance each score is from the mean..

## How do you explain variability?

Variability, almost by definition, is the extent to which data points in a statistical distribution or data set diverge—vary—from the average value, as well as the extent to which these data points differ from each other. In financial terms, this is most often applied to the variability of investment returns.

## What is variability and why is it important?

Variability serves both as a descriptive measure and as an important component of most inferential statistics. … In the context of inferential statistics, variability provides a measure of how accurately any individual score or sample represents the entire population.

## What causes immune system to weaken?

Your immune system can also be weakened by smoking, alcohol, and poor nutrition. AIDS. HIV, which causes AIDS, is an acquired viral infection that destroys important white blood cells and weakens the immune system. People with HIV/AIDS become seriously ill with infections that most people can fight off.

## Can anxiety weaken your immune system?

But if you repeatedly feel anxious and stressed or it lasts a long time, your body never gets the signal to return to normal functioning. This can weaken your immune system, leaving you more vulnerable to viral infections and frequent illnesses. Also, your regular vaccines may not work as well if you have anxiety.

## What are the implications of compromised immune function as a result of exposure to chronic stress?

What are the implications of compromised immune function as a result of exposure to chronic stress? Chronic stress can lead to increased susceptibility to bacterial and viral infections, and potentially an increased risk of cancer.

## Which of the techniques discussed would be viable options for you to determine how activity in the reticular formation is related to sleep and wakefulness?

Which of the techniques discussed would be viable options for you to determine how activity in the reticular formation is related to sleep and wakefulness? Why? The most viable techniques are fMRI and PET because of their ability to provide information about brain activity and structure simultaneously.

## What is an example of variability?

Consequently, the standard deviation is the most widely used measure of variability. For example, in the pizza delivery example, a standard deviation of 5 indicates that the typical delivery time is plus or minus 5 minutes from the mean. It’s often reported along with the mean: 20 minutes (s.d. 5).

## What are the types of variability?

The most common measures of variability are the range, the interquartile range (IQR), variance, and standard deviation.

## How can I strengthen my immune system?

Healthy ways to strengthen your immune systemDon’t smoke.Eat a diet high in fruits and vegetables.Exercise regularly.Maintain a healthy weight.If you drink alcohol, drink only in moderation.Get adequate sleep.Take steps to avoid infection, such as washing your hands frequently and cooking meats thoroughly.More items…•

## Why do we measure variability?

1 Why Important. Why do you need to know about measures of variability? You need to be able to understand how the degree to which data values are spread out in a distribution can be assessed using simple measures to best represent the variability in the data.

## Why would this particular effect make these drugs such effective local anesthetics?

Drugs such as lidocaine and novocaine act as Na+ channel blockers. … Why would this particular effect make these drugs such effective local anesthetics? The action potential is initiated by an influx of Na+ into the neuron. If this process is prevented, then no action potentials in neurons in a given area will occur.