The grades on a Math test are: 67, 90, 84, 35, 78, 64, 76, 89, 96, 53, 74, 88, 49, 66, 67, 92, 45, 89 79, 72, 52, 80, 93, 58, 74, 80, 58, 85, 37, 62, 84, 73, 74, 82, 70, 77. a. Find mean, median mode. b. Find the range and IQR . c. Find Variance and standard deviation.
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 grades on a Math test are:
67, 90, 84, 35, 78, 64, 76, 89, 96, 53, 74, 88, 49, 66, 67, 92, 45, 89
79, 72, 52, 80, 93, 58, 74, 80, 58, 85, 37, 62, 84, 73, 74, 82, 70, 77.
a. Find
b. Find the
c. Find Variance and standard deviation.
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