In a car fix station, the oil of the cars is changed with 15 minutes in average and standart deviation is 2.4 minutes. For the customer satisfication the manager initiates a company and offers 50% discount for the ones waiting for more than a predefined duration. In order to balance the expenditures the manager does not want the number of customers subjected to the discount more than 5%. Calculate the required minimum 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.
In a car fix station, the oil of the cars is changed with 15 minutes in average and standart deviation is 2.4 minutes. For the customer satisfication the manager initiates a company and offers 50% discount for the ones waiting for more than a predefined duration. In order to balance the expenditures the manager does not want the number of customers subjected to the discount more than 5%. Calculate the required minimum waiting time?
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