How to change a character's humanoid using variables?

The script will choose the player and put the player's name on a variable "chosenplayer" , in need to use the variable to change the player's humanoid on the function "ChooseEvent()", how do i do that?

current script:

players = {}
local chosenplayer = nil
local chosenplayer2 = nil
local workspace1 = game.Workspace
local serverstore = game:GetService("ServerStorage")
events = {"man"}
local chosenevent = nil

local function onCharacterAdded(chr)
	table.insert(players, chr)
end

local index = -1

local function onCharacterRemoved(removed)
	for i, v in pairs (players) do
		if removed == v then
			index = i
		end
	end
	table.remove(players, index)
end

local function ChooseEvent()
	local chooseevent = events[math.random(1,#events)]
	chosenevent = chooseevent
	print(chosenevent)
	if  chosenevent == "man" then
       	local value = players[math.random(1,#players)]
----- script that changes the player's stats'
	end
end






game.Players.PlayerAdded:Connect(onCharacterAdded)
game.Players.PlayerRemoving:Connect(onCharacterRemoved)