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.
1.2 - The 7 Step Process of Statistical Hypothesis Testing. We will cover the seven steps one by one. Step 1: State the Null Hypothesis. The null hypothesis can be thought of as the opposite of the guess the research made (in this example the biologist thinks the plant height will be different for the fertilizers). So the null would be that there will be no difference among the groups of plants.