Week Inv/Bk Demand Incom. Outg. Order Current ship ship placed cost 1 12 4 4 4 4 6 2 12 4 4 4 4 12 3 8 8 4 8 4 16 4 8 4 4 4 4 20 5 8 4 4 4 4 24 6 8 4 4 4 4 28 7 8 4 4 4 4 32 8 8 4 4 4 8 36 9 8 4 4 4 4 40 10 4 8 4 8 4 42 What is the ratio of the standard deviation of orders to the standard deviation of the demand?
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.
| Week | Inv/Bk | Demand | Incom. | Outg. | Order | Current |
| ship | ship | placed | cost | |||
| 1 | 12 | 4 | 4 | 4 | 4 | 6 |
| 2 | 12 | 4 | 4 | 4 | 4 | 12 |
| 3 | 8 | 8 | 4 | 8 | 4 | 16 |
| 4 | 8 | 4 | 4 | 4 | 4 | 20 |
| 5 | 8 | 4 | 4 | 4 | 4 | 24 |
| 6 | 8 | 4 | 4 | 4 | 4 | 28 |
| 7 | 8 | 4 | 4 | 4 | 4 | 32 |
| 8 | 8 | 4 | 4 | 4 | 8 | 36 |
| 9 | 8 | 4 | 4 | 4 | 4 | 40 |
| 10 | 4 | 8 | 4 | 8 | 4 | 42 |
What is the ratio of the standard deviation of orders to the standard deviation of the demand?
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