A study was conducted of the 12-month earnings per share for two categories of airline companies. Large Airlines Small Airlines $4.36 6.19 - 0.42 3.73 0.26 6.27 $1.60 -1.98 1.03 -0.21 -1.15 4.19 0.59 1.52 1.97 4.57 0.05 Based on the above data, use EXCEL to find mean, median, mode, variance, range and coefficient of variation
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.
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