My garden hose does not have a threaded female connector at the end. In that case, how can I connect a nozzle to the hose? I tried to find if there is any type of threaded connector that can be inserted into the hose to make a connection but couldn't find any. Is there any such kind of connector?
Yes, search for a male garden hose replacement fitting, they are available at most home stores for under $5. They have a barbed fitting that goes into the hose end and a clamp. (On garden hoses and pipes the male end has the threads on the outside and is furthest from the water source, since it goes "inside" of the female end)