The amount of time (in minutes) that Lumen University students spent on social media per day are reported to be normally distributed. The normal curve is presented below. 54 58 62 66 70 74 78 Time (in minutes) spent on social media per day Use the Empirical Rule to answer the following questions. a. The mean is 66 . b. The standard deviation is 4 . c. 68 % of Lumen University students spend between 62 and 70 minutes per day on social media. d. 95 % of Lumen University students spend between 58 and 74 minutes per day on social media. e. 99.7 % of Lumen University students spend between 54 and 78 minutes per day on social media. f. 34 % of Lumen University students spend between 66 and 70 minutes per day on social media. g. What percentage of Lumen University students spent less than 66 minutes on social media per day? 50 % h. What percentage of Lumen University students spent more than 70 minutes on social media per day? % i. What percentage of Lumen University students spent between 54 minutes and 74 on social media per day? % Submit Previous