The following table gives the age group for 80 persons in a glee club. Age group No. of persons (f) 10 s 20 ? 20 s 30 30 S 40 ? 40 s 50 16 50 S 60 ? 60 S 70 ? 70 < 80 Ef=80 From the table above A. Prepare a table of values and calculate an estimate for the mean and standard deviation. B. Construct a histogram for the data above. C. Use the histogram to estimate the mode.
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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