Q1.) a) The following reading were recorded by testing measurement 2 4 2 01 No. of reading 1 Deviation from 2 3 3 1 (the mean (di For the deviation from the mean of (3), reading value is (-2). Calculate: 1- Arithmetic mean. 2- The value of each reading (xi). 3- The average deviation (D). 4- The standard deviation (ơ). 5- Draw the histogram for above readings.
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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