Carol, its obvious that you didnt messure the right way your resistance wire. Its not you, its your multimeter. It happens to me too. I messure 1,5 ohm and the final result comes to 2 or 3 ohm sometimes. So before you messure your wire do a check with your multimeter to see if it shows its internal resistance in the right way and then double check. Then connect wires and check again the resistance but before you do that messure again its internal rtesistance.
The wire has 0,1ohm resistance so if you want to make a 1,5ohm and the internal resistance of your meter is 0,4, then make a wire that your multimeter will show that is 2 ohms. So 2 ohms-0,4-0,1=1,5 ohm
The other reason is that you didnt twist the wires together tight so current goes inside resistance wire. I dont think that this is happening, but keep that in mind too
The wire has 0,1ohm resistance so if you want to make a 1,5ohm and the internal resistance of your meter is 0,4, then make a wire that your multimeter will show that is 2 ohms. So 2 ohms-0,4-0,1=1,5 ohm
The other reason is that you didnt twist the wires together tight so current goes inside resistance wire. I dont think that this is happening, but keep that in mind too
