How Long to Cook a Whole Chicken. 1  2-1/2 to 3 pounds: Roast at 375 degrees F for 1 to 1-1/4 hours. 2  3 to 3-1/2 pounds: Roast at 375 degrees F for 1-1/4 to 1-1/2 hours.3  3-1/2 to 4 pounds: Roast at 375 degrees F for 1-1/4 to 1-3/4 hours. 4  4-1/2 to 5 pounds: Roast at 375 degrees F for 1-1/2 to 2 hours.ow Long to Cook a Whole Chicken. 1  2-1/2 to 3 pounds: Roast at 375 degrees F for 1 to 1-1/4 hours. 2  3 to 3-1/2 pounds: Roast at 375 degrees F for 1-1/4 to 1-1/2 hours.
The two main types of hypotheses are simple and complex hypothesis.  The simple hypothesis predicts the relationship between a single  dependent and independent variables. Oâ¦n the other hand, the complex  hypothesis describes the relation between two or more dependent and  independent variables.
A hypothesis is used to determine the relationship between two variables, which are the two things that are being tested. One variable is independent and is the cause of any changes in the outcome. The other variable is dependent and is the outcome itself.