16. A study compared the on-time performance for three bus companies. A table with the joint and marginal frequencies of the results is shown. Determine which company has the best on-time performance. Explain how to identify the company that performed best. On-time Late Total Cross-Country Bus 0,43 0.06 0.49 Express Way Lines 0.27 0,06 0.33 Red Dog Transit 0.14 0,04 0.18 Total 0,84 0.16
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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