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Explain the cost structure of the air carriers.
Population Normal
Population normal, often referring to a normal distribution in a population, describes a bell-shaped frequency distribution that is symmetric about the mean.
Hourly Fees
A method of billing where charges are applied based on the amount of time spent on a task, usually measured in hours.
Significance Level
The probability of rejecting the null hypothesis in a statistical test when it is actually true; a measure of the risk of making a Type I error.
Sample Mean
The average value of a sample, calculated by summing all observations and dividing by the number of observations in the sample.
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