Determine what the key terms refer to in the following survey. To determine the average number of classes Santa Ana College students were taking, a sample of 30 Santa Ana College students were given and answered the following survey. How many classes you are taking this semester. o 1 o 2 o 3 o 4 Sample a. In average, those 30 students were taking 2.5 classes Parameter b. In average, all students in Santa Ana College were taking 2.6 classes Population c. The 30 Santa Ana College students who were surveyed Statistic d. All students in Santa Ana College

Pet Owners According to the Humane Society, in 2015, 65% of U.S. households owned at least one pet, and 42% of households who did own pets owned at least two. The U.S. Census Bureau tells us that there were 117 million households in 2015. How many households owned at least two pets? Report your answer in millions rounded to two places.

In a competition of 50 professional ballroom dancers, 22 compete in the fox-trot competition, 18 compete in the tango competition. and 6compete in both the fox-trot and tango competitions. How many dancers compete in the foxtrot or tango competitions?

Is it possible that P(AB)=P(A)? Explain.