Distribution of Math Test Scores 12 The graph shows the distribution of scores of 30 students on a mathematics test. Based on the 61-70 71-80 Test Scores histogram, which statement must be true? The mean test The lowest test The lower Score is 41%. Score is The highest test quartile of the The median between 81% Score is 100%. test scores is test score is not and 90%. greater than greater than 60%. 80%. Number of Students 41-50 51-60 81-90 91-१00
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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