7. A certain type of vaccine is known to be only 25% effective after a period of 2 years. To determine if a new vaccine is superior in providing prote against the same virus for a longer period of time, a study consisting of 20 randomly chosen people were inoculated, and the efficiency of the vac measured after 2 years.Which of the following represents a Type I error in a hypothesis test appropriate to this study? The study concluded that the new vaccine has a higher efficacy rate when in fact it is less efficient. The study concluded that the new vaccine does not have a higher efficacy rate when in fact it is more efficient. The study concluded that a different vaccine should be made due to the old vaccines being more efficient. The study concluded that the two vaccines must be taken simultaneously to increase its efficacy. 8. Which of the following is most likely to be the correlation coefficient between variables "weight" and "chest size"? -0.76 -0.16 0.16 0.76Psych201 88 3 Mgrit200 85 3 Which of the following is the weighted mean of student A? 8394 84 84.26 84.33 10. 7 amethyst and 6 jade stones were placed next to each other to create a round bracelet, In how many ways can the stones be arranged suc two amethyst stones are placed next to each other? 86,400.00 2,880.00