16. In a test in Algebra, you got a score of 82 and you want to know how you fared in comparison with your classmates. If your teacher tells you that you scored at the 90th percentile, what does it means? A. It means that 90% of the grades were lower than yours and 10% were higher. B. It means that 90% of the grades were higher than yours and 10% were lower. C. It means that 82% of the grades were lower than yours and 90% were higher. D. It means that 90% of the grades were lower than yours and 82% were higher.
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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