Lori Becher has been the production manager of Medical Suppliers, Inc. (MSI), for the last 17 years. MSI is a producer of bandages and arm slings. During the last 5 years, the demand for the No-Stick bandage has been fairly constant. On the average, sales have been about 87,000 packages of No-Stick. Lori has reason to believe that the distribution of No-Stick follows a normal curve, with a standard deviation of 4,000 packages. What is the probability sales will be less than 81,000 packages?
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.
Lori Becher has been the production manager of Medical Suppliers, Inc. (MSI), for the last 17 years. MSI is a producer of bandages and arm slings. During the last 5 years, the demand for the No-Stick bandage has been fairly constant. On the average, sales have been about 87,000 packages of No-Stick. Lori has reason to believe that the distribution of No-Stick follows a normal curve, with a standard deviation of 4,000 packages. What is the probability sales will be less than 81,000 packages?
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