Two years ago, it was determined that 45% of young adults vaped on a regular basis. A researcher is wondering whether that proportion has changed, A broad sample of 2090 young adults is taken and 42% of them said that they vape regularly. An hypothesis test is conducted to determine whether or not this indicates a significant change in the proportion of young adults who vape. For this problem, suppose the test was conducted and the p-value turned out to be .1026, what would you conclude? O The proportion of young adults who vape is not significantly different than it was two years ago O The proportion of young adults who vape is significantly different than what it was two years ago O The proportion of young adults who vape is significantly less than it was two years ago. The proportion of young adults who vape is not significantly less than it was two years ago 32 1.5 points Below are the times for 6 students to complete a test in a 50-minute class. 50 23 18 25 16 42 Find the median. O 25 O 29 21.5 18 O 24 33 1.5 points The following table gives the probability distribution of causes of death in the US Cause Probability cardiovascular disease 14 malignancies 22 all other causes 31 Two college roommates die (much later in life!) independently of each other. What is the probability that both of them die of cardiovascular disease? O .2209 O .47 .2491 O .94 34 1.5 points Suppose it has been determined that 70% of the planes arrive on time at a certain airport So X = # of planes that are on time Y = # of planes that are not on time Find the probability that more than 78% of the next 80 planes will be on time. Which of the following is a true statement? O the z-score is negative and the probability is greater than .5 the z-score is positive and the probability is less than .5 O the z-score is positive and the probability is greater than .5 the probability can't be determined the z-score is negative and the probability is less than .5