What is the cumulative area from the left under the curve for a z-score of -0.78? What is the area on the right of that z-score? Hint. You will have two answers (one for the left and one for the right). Student's partially finished answer: The first part is to find the cumulative area from the left under the curve for a z-score of - 0.78. This means that I need to find the probability that a z-score is less than -0.78. Show your calculations using Excel functions in the area to the right of this text box and finish answering the problem with explanations below. A research shows that the Richter scale magnitudes of earthquakes are normally distributed with a mean of 1.67 and a standard deviation of 0.385. Earthquakes with magnitudes less than 2.00 are considered "microearthquakes" that humans do not feel. What percentage of earthquakes fall into this category? Student's partially finished answer: We need to find the probability that earthquakes fall into the microearthquake category. The first step is to find the probability that the Richter scale is less than 2.00. Show your calculations using Excel functions in the area to the right of this text box and finish answering the problem with explanations below