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Directions: Read and understand each item carefully. Circle the letter of the correct answer. 1. When n=23, what is the degree of freedom? A. 22 B. 23 C. 24 D. 25 2. What is the critical value when Ha: u> uo and a= 0.05? A. 0.4500 B. 1.64 C. 1.65 D. 1.645 3-5. Refer to the figure below to answer numbers 8-10. 1.645 Critical Value 3. Which of the following alternative hypotheses is illustrated by the graph above? orch :BH V C. Ha: H