The accompanying table gives the number of copies sold for 30 top-selling novels. Use data given in the table to construct a frequency distribution with a first class (in millions) of 0– 99. Construct a frequency distribution. Copies Sold (millions) Number of Books Copies Sold (millions) 0- 99 500 87 65 300 83 60 200 80 60 200 80 60 200 80 60 160 80 55 150 75 50 140 75 45 100 75 45 100 65 40
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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