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Cricket scores are calculated using a math formula called the Duckworth-Lewis method. Rather than a straight scoring method, cricket scores rely on this formula to determine the target score. It has many critics.
You don't. SAT scores are multiples of 10. However, when SAT's are used for statistical purposes (e.g. finding the average, etc.) then SAT scores do not have to be multiples of 10.
Best to use a histogram i think! z scores can probably be used too however they seem more a method of how to transform outliers in workable scores.
It is the standard error.
You can calculate your grade by finding the average mark of your scores in various units/subjects. The average mark is then placed against the grading system to determine the grade.
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Statistical Approach
The mean of a distribution of scores is the average.
You would add all the numbers or scores out and then divide by how many scores you added.
How do you determine whether to use present or past tense? Your scores will determine the winner.
It is not accurate or ethical to determine a state's intelligence based on average IQ scores. Intelligence is a complex trait influenced by many factors beyond just where someone lives.
Adding all the scores and dividing by the number of scores yields the mean or average.