dit View Insert Format Tools Add-ons Help All changes saved in Drive 100% Heading 1 Comic San.. BIU A 11 4 Standard Deviation (Grouped Data) Ef(m-x) n-1 Midpoint (m) Hours Number of (m- x) (m- x ) fm- x2 Worked Students 0-9 24 10-19 14 20-29 39 18 30-39 40-49 5 13644 2110 N 100 Σ
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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