How to scale a signal to get desired variance [duplicate]

1. How do you rescale standard deviation?
2. What are the types of signal scaling?
3. What is variance in signal processing?

How do you rescale standard deviation?

When data is rescaled the median, mean(μ), and standard deviation(σ) are all rescaled by the same constant. You will multiply by the scaling constant k to determine the new mean, median, or standard deviation. The variance(σ²) is rescaled by multiplying by the scaling constant squared.

What are the types of signal scaling?

Depending upon the sign of the constant, it may be either amplitude scaling or attenuation.

What is variance in signal processing?

The variance of a discrete-time signal is the square of the standard deviation of the signal. Variance gives a measure of deviation of the signal from its mean value.