The following table gives the total caseload (in millions) in a state's courts from 2004 through 2009. Year 2004 2005 2006 2007 2008 2009 Cases 4.1 4.5 4.6 4.4 4.8 4.1 Find the mean of the total caseload for the state's courts from 2004 through 2009. (Round your answer to two decimal places.) million cases What is the standard deviation for these data? (Round your answer to two decimal places
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.
The following table gives the total caseload (in millions) in a state's courts from 2004 through 2009.
| Year | 2004 | 2005 | 2006 | 2007 | 2008 | 2009 |
|---|---|---|---|---|---|---|
| Cases | 4.1 | 4.5 | 4.6 | 4.4 | 4.8 | 4.1 |
Find the mean of the total caseload for the state's courts from 2004 through 2009. (Round your answer to two decimal places.)
million cases
What is the standard deviation for these data? (Round your answer to two decimal places.)
million cases
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