Develop hypotheses that can be used to test whether the percent of workers not re- quired to contribute to their companys health care plan has declined

55. According to the federal government, 24% of workers covered by their companys health care plan were not required to contribute to the premium (Statistical Abstract of the United States: 2006). A recent study found that 81 out of 400 workers sampled were not required to contribute to their companys health care plan. a. Develop hypotheses that can be used to test whether the percent of workers not re- quired to contribute to their companys health care plan has declined. b. What is a point estimate of the proportion receiving free company-sponsored health care insurance? c. Has a statistically significant decline occurred in the proportion of workers receiving free company-sponsored health care insurance? Use = .05.
Answer: The required answers are given below: Here we observe that the P value is less than the level of the significance a=0.05, so we reject the null hypothesis