Calculate the mean percent of African American persons living below the poverty level. This will be the third column
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.
Solution:
The mean percent of African American persons living below the poverty level is required.
It can be easily calculated using MS-Excel. For that, enter the given data from the column "Black or African American" in any column of an excel sheet. Let the data be entered from A1 to A52 (that is, in column A, from row 1 to row 52).
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