The waiting time for a customer service call follows a norma…

The waiting time for a customer service call follows a normal distribution with a mean of 10 minutes and a standard deviation of 2 minutes. The call center manager wants to figure out what a likely range of outcomes is for their waiting times. What is the lower bound to an interval in which the waiting time will fall 95% of the time? Provide your answer rounded to one decimal place.

The number of daily visitors to a boba tea shop follows a no…

The number of daily visitors to a boba tea shop follows a normal distribution with a mean of 5000 and a standard deviation of 800. The shop owner wants to figure out what a likely range of outcomes is for their daily visitors. What is the upper bound to an interval in which the number of daily visitors will fall 85% of the time? Provide your answer rounded to the nearest visitor.

You are a business analyst working for a logistics company i…

You are a business analyst working for a logistics company in Mumbai. The company is planning a report on the on-time delivery rate of their packages. To provide accurate information to your clients, your supervisor has asked you to estimate the proportion of packages that are delivered on time. You have collected a sample data set from various deliveries in Mumbai. Using this data, estimate the proportion of packages that are delivered on time. Use a 90% confidence level for your estimate and round your answers to four decimal places.   Here is the sample data you collected (“on time” indicates on-time delivery, “late” indicates late delivery):   on time, on time, on time, late, on time, late, late, on time, late, late, on time, on time, late, late, on time, on time, on time, on time, late, late, late, late, on time, on time, late, on time, on time, late, late, late   HELPFUL NOTE: Copy and paste the data into an Excel workbook. If it jams it all into a single cell, use the “text to columns” function in the Data ribbon to tell it to split it into individual cells using a comma delimiter. Left bound = Right bound =