Data shown in the following table represent the compressive strength of concrete cylinder samples in MPa. Construct a grouped frequency distribution for the data. Also, find the Mean for the data using the constructed grouped frequency distribution table. Data: 21, 35, 32, 10, 15, 8 13, 20, 30, 32, 13, 25 35, 28, 12, 16, 27, 30 33, 33, 21, 24, 9, 8 18, 17, 30, 32, 17, 13
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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