21 25 25 18 44 20 25 15 19 24 10 28 30 25 25 25 25 10 25 25 20 20 20 15 10 20 25 25 13 30 15 28 15 15 35 24 40 15 20 35 5 50 30 15 25 40 15 25 15 75 33 23 30 10 15 8 25 10 8 20 25 20 30 FOR UNGROUPED DATA (USE 2 DECIMAL PLACES) MEAN = MEDIAN = MODE =
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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