Q1: the data that we have are: 2, 3, 8, 5, 3, 2, 6, 9, 3, 5, 8, 2, 5, 6, 3, 4. 3, 9, 2, 5, 3, 6, 3, 2, 9, 3 How to make a cumulative frequency * table إضافة ملف Q2: what is the standard deviation for this data points 2, * 5, 8, 11, 14, 17 إضافة ملف Q3: find range and mode for both data points: a) 2, 4, 6, 8, 10 b) 1, 1, 2, 2, 3, 3, 4, 4, 4, 5, 4, 5, 5
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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