After reading the skyrim wiki, i got a couple of questions about sneaking so that i make sure i understood correctly:

Wearing heavy armor lowers the effectiveness of my sneaking, by making my movement rather loud.

If i have an item/spell that gives Muffled (maximum magnitude of 1?), my heavy armor will no longer be making any sound?

So with the maximum Muffled effect, i can sneak around in the heaviest armor without any problem - just like i was in the lightest armor?

Is there any way for me to know what is the magnitude effect of the Muffled on an item that i find?

What is the magnitude effect of the Muffled enchant if i put it on an item, while my enchanting is at almost no skill (20 skill, no perks)?

Is being in robes/clothing (or even naked) better for Sneaking compared to being in Light Armor?

Also the heavy armor tends to slow down my movement, especially in sneaking - using the Steed Stone (with heavy armor) should make my movement as fast as if i was in the lightest armor, even during sneaking?

Power Attacks do get their damage multiplied by the sneak attack bonus?

So i should always try to power attack from sneaking for maximum lethality?

When i am using two one-handed weapons (two daggers), the biggest power attack is a "3 swing" move - is there any way to make my character stop performing the power attack after the first or second swing, so that i don't risk hitting a wall and causing a lot of noise (alerting nearby foes).

Is it in any way relevant at what body party my swords/arrows hit an opponent?

Does a sneak attack (or even a regular attack) do more damage if i hit the enemy in the head?

Thank you for reading and helping me out

1. I don't know the specifics of the spell, it either muffles your boots completely or reduces the noise from your overall amour (I think).

2. There's no way of telling, no. I don't know what the magnitude (maximum?) effect is for someone of your skill.

3. The lighter your apparel, the better your sneaking (disregarding perks).

4. I'm fairly sure, yes.

5. They do, but they also make more noise. If there is nothing around bar your target, go for a power attack.

6. Unfortunately no, that's why I rarely use it while sneaking.

7. Targeting a specific part of your enemy will have no affect on the amount of damage you cause.