Given a desired SNR value of 10dB, generate signal and noise that gives this snr

I have a SNR of 10

I need to generate a signal and noise such that signal_power/noise_power will give this SNR value

[Walter Roberson]

Definitions quiz for you:

If you have a signal of one level, and a noise of a different level, then do you talk about a particular SNR ratio if:

• the maximum of the absolute value of the signal is a particular ratio to the maximum of the absolute value of the noise ?
• the mean of the signal is a particular ratio to the mean of the noise?
• the average of the signal is a particular ratio to the average of the noise?
• the median of the signal is a particular ratio to the median of the noise?
• the power of the signal is a particular ratio to the power of the noise?
• the peak-to-peak distance of the extremes of the signal has a particular ratio to the peak-to-peak distance of the extremes of the noise?

Or something else?

What, in other words, is the definition of SNR ?