The table below shows the scores of a group of students on a 10-point quiz. Test Score Frequency 3 2 4 1 5 3 6 2 7 3 8 2 9 5 10 2 The mean score on this test is: The median score on this test is:
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 table below shows the scores of a group of students on a 10-point quiz.
Test Score | Frequency |
---|---|
3 | 2 |
4 | 1 |
5 | 3 |
6 | 2 |
7 | 3 |
8 | 2 |
9 | 5 |
10 | 2 |
The mean score on this test is:
The median score on this test is:
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