In the U.S. Census Bureau document America’s Families and Living Arrangements: 2017, we find these data on the marital status of American women aged 1515 years and older as of 2017:
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.
In the U.S. Census Bureau document America’s Families and Living Arrangements: 2017, we find these data on the marital status of American women aged 1515 years and older as of 2017:
| Current marital status | Count (thousands) |
|---|---|
| Never married | 3908739087 |
| Married | 6519365193 |
| Widowed | 1164211642 |
| Divorced | 1459114591 |
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