Answer Happy

Suppose a normally distributed set of data with 6800 observations has a mean of 130 and a standard deviation of 19. Use the 68-95-99.7 Rule to determine the number of observations in the data set expected to be above a value of 168. Round your answer to the nearest whole value. Hint: This problem is asking for how many observations not the percent. Answer = Tip: Don't round any probabilities or percentages in your calculations. Keep all decimal places and round at the END of the problem.
In a mid-size company in New Orleans, the distribution of the number of phone calls answered each day by each of the 12 receptionists is bell-shaped and has a mean of 50 and a standard deviation of 4. Using the empirical (68-95-99.7) rule, what is the approximate percentage of daily phone calls numbering between 46 and 54? Caution: Using tables or Excel for this may produce a wrong answer. Use the 68-95-99.7 rule. Answer 68.26 %. (Enter your answer as a percent, but do not enter the percent symbol. Do not enter in decimal form or round your answer. For example, enter 93.8 for 93.8%, not 0.939)