The amount of gas a local gas station sells is random. The following describes the distribution of gasoline sales in a given day. There is a probability of 0.18 that the station will sell 1200 gallons of gas; there is a probability of 0.27 that the station will sell 1400 gallons of gas; there is a probability of 0.33 that the station will sell 1800 gallons of gas; otherwise, the station sells 2100 gallons of gas. What is the expected number of gallons the station sells in a day? (please express your answer using 2 decimal places)
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.
The amount of gas a local gas station sells is random. The following describes the distribution of gasoline sales in a given day. There is a
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