Reference no: EM132847671
1. Determine whether the given value is a parameter or statistics. Please explain your answer.
(a) An agency conducts a survey on the choice of vegetable by Americans. It is reported by the agency that 57% of the respondents prefers broccoli.
(b)A UMUC STAT 200 instructor randomly selected 100 students and found the average study time is 20.5 hours per week.
2. Mimi is a recent college graduate, who is considering some career opportunities. One factor that will affect her decision is how much money she is likely to make. She got salary information from Internet. Since you are taking a Statistics course, she would like to get your opinion on whether mean salary or median salary information is more useful for her. What would be your recommendation? Please explain your answer.
3. Assume that you make random guesses for 5 true-or-false questions.
(a) What is the probability that you get all 5 answers correct? (Show work and write the answer in simplest fraction form)
(b) What is the probability of getting the correct answer in the 5th question, given that the first four answers are all wrong? (Show work and write the answer in simplest fraction form)
(c) If event A is "Getting the correct answer in the 5th question" and event B is "The first four answers are all wrong". Are event A and event B independent? Please explain.