Assignment:
A national public television network has found that 35% of its contributions are for less than $20, with 45% for $20–$50, and 20% for more than $50. In a random sample of 200 of the contributions to a local station, 42% were for less than $20, 43% were for $20–$50, and 15% were over $50. At the 0.05 level, does the local station’s distribution of contributions differ significantly from that experienced nationally?
Provide complete and step by step solution for the question and show calculations and use formulas.