A bicentennial quarter no mint weight 5.73 and 5.75

I'm not sure what or if you have a question but those are all perfectly normal quarters worth 25 cents each.

Just wanted to know if it was valuable and have more coins to help me understand I have 6 quarter 

2020 p salt river bay weigh 5.75 grams 

1965 no mint weigh 5.48 grams 

2023 p with lady with no background weigh 5.74

2000 p Maryland 5.73 on back and 5.74 on front 

2000 p new hampere weigh 5.77 grams

All are worth US $0.25.

Commonly a bicentennial quarter weigh only 5.66 grams I have 3 of them two weigh the same and the other one weigh 5.75 grams on one side and on the front of president face side it weigh 5.73

An American quarter weighs 5.670 grams, with a typical tolerance range of 5.443 g to 5.897 g due to production variations.

Why is my other same coins weigh 5.66 and the same no mint mark quarter is 5.75 grams that not a error coin 

Bigsbugs9

Why is my other same coins weigh 5.66 and the same no mint mark quarter is 5.75 grams that not a error coin 

Already explained. When you make over 1.6 BILLION of anything you have to have some tolerance on the weight.  5.67g is the nominal or target weight.  The mint has a working tolerance of +/- 4% (+/- 0.23g). Your coin in only +1.7% over target.  In reality, the US Mint holds modern coins to +/- 2% but wouldn't reject anything up to +/- 4%.  Here is a distribution graph of quarters (new) I made awhile ago:

I have a 1966 no mint quarter that weigh 5.55 grams is that a error coin

Want to know if a 2000 p new hampshire coin should weigh 5.74 grams and one that weigh 5.77 grams is that possible 

A 2000 P New Hampshire (new, not circulated) should weigh between 5.44 grams and 5.90 grams.