25. A research conducted on a certain company last year showed that 30% of the employees would rather choose the work from home scheme that reporting physically for work. Which choice best represents a parameter? A. 30 employees B. all employees C. the percentage of employee D. work from home than reporting physically. 26. A random sample of 50 bottles of shampoo showed an average content of 69 ml. It is known that the population standard deviation of the contents is 0.21 ml. In this problem, translate the parameter into symbols. A. U=69 B. 0=0.21 C. J=0.21 D. o=69 27. What is the parameter in the problem that follows? A fast food outlet claims that the mean waiting time to be served is less than 15 minutes. A random sample of 20 customers has a mean of 17 minutes with a standard deviation of 2 minutes. Test the fast food outlet's claim at a = 0.05. A. mean of 15 minutes B. the level of significance of 0.05 C. random sample of 20 costumers D. the mean waiting time is less than 2 minutes 28. A certain politician is concerned about the percentage of population who express disapproval of his performance. His political committee pays for a newspaper ad, hoping to keep his disapproval rating below 30%. What is the parameter? A. average of all population B. disapproval rating below 30% C. political committee paying a newspaper ad D. percentage of population who express disapproval Directions: 29-30. State the null and the alternative hypotheses of the given statement