The average score of gmat is 547. Assume that gmat scores are bell-shaped with a standard deviation of 100. Use the empirical rule to answer the following. What percentage of GMAT scores are 647 or 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.
The average score of gmat is 547. Assume that gmat scores are bell-shaped with a standard deviation of 100. Use the
What percentage of GMAT scores are 647 or higher?
I found the step by step online but I still dont understand how the percentage came to 16%
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