In a sample of 18 students the following number of absences were recorded for the previous semester: { 4, 3, 1, -1, 4, 2, 3, 6, 1, 2, 3, 2, 4, 1, 1, 5, 4, 1 } Find the mean, median, mode, and range of this sample. Show work. (Round values to two 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.
In a sample of 18 students the following number of absences were recorded for the previous semester:
{ 4, 3, 1, -1, 4, 2, 3, 6, 1, 2, 3, 2, 4, 1, 1, 5, 4, 1 }
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