In a certain discrete math class, three quizzes were given. Out of the 30 students in the class: • 11 scored 12 or above on quiz #1, • 10 scored 12 or above on quiz #2, • 19 scored 12 or above on quiz #3, • 5 scored 12 or above on quizzes #1 and #2, • 12 scored 12 or above on quizzes #1 and #3, • 6 scored 12 or above on quizzes #2 and #3, 1 scored 12 or above on quizzes #1, #2, and #3. How many Scored 12 or above on at least one quiz?
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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