The local coffee shop has 2 parallel queues with the same amount of customers. There are 2 customers in both queues waiting to be served (half of the customers on each queue). You arrive as the 3th customer to the coffee shop. In average, the Barista at each queue is able to process the order of one customer in about 209 seconds. The process capability is +/- 20 seconds per customer. How many minutes in average you have to wait to get your order? What could be your shortest waiting time? What could be your longest waiting time?
Inverse Normal Distribution
The method used for finding the corresponding z-critical value in a normal distribution using the known probability is said to be an inverse normal distribution. The inverse normal distribution is a continuous probability distribution with a family of two parameters.
Mean, Median, Mode
It is a descriptive summary of a data set. It can be defined by using some of the measures. The central tendencies do not provide information regarding individual data from the dataset. However, they give a summary of the data set. The central tendency or measure of central tendency is a central or typical value for a probability distribution.
Z-Scores
A z-score is a unit of measurement used in statistics to describe the position of a raw score in terms of its distance from the mean, measured with reference to standard deviation from the mean. Z-scores are useful in statistics because they allow comparison between two scores that belong to different normal distributions.
The local coffee shop has 2 parallel queues with the same amount of customers. There are 2 customers in both queues waiting to be served (half of the customers on each queue). You arrive as the 3th customer to the coffee shop. In average, the Barista at each queue is able to process the order of one customer in about 209 seconds. The process capability is +/- 20 seconds per customer. How many minutes in average you have to wait to get your order? What could be your shortest waiting time? What could be your longest waiting time?
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