The estimation of the population average family expenditure on food based on the sample average expenditure of 1,000 families is an example of a. a statistic b. descriptive statistics c. inferential statistics d.a parameter A campus program evenly enrolls undergraduate and graduate students (50% of all students are undergraduates). If a random sample of 4 students is selected from the program to be interviewed about the introduction of a new fast food outlet on the ground oor of the campus building, what is the probability that all 4 students selected are undergraduate students. Hint: you can use a Binomial Distribution to solve this problem. a. 0.6250 b. 0.0745 c. 0.0625 d. 0.0324 Thirty-six of the staff of 80 teachers at a local intermediate school are certified in Cardio-Pulmonary Resuscitation (CPR). In other words the probability of a CPR certified teacher is 36/80. In 180 days of school, about how many days can we expect that the teacher on bus duty will likely be certified in CPR? In other words, what is the average (mean) number of days (out of 180 days) that we have a CPR certified teacher on the bus? Hint: The number of days that we have a CPR certified teacher on the bus out the total days of school follows a Binomial Distribution. O a. 180 O b. 81 O c. 45 O d. 36