Given a set of data sorted from smallest to largest, define the first, second, and third quartiles. The first quartile is the mean of the lower half of the data below the median. The second quartile is the median. The third quartile is the mean of the upper half of the data above the median. O The first quartile is the area within one standard deviation of the mean. The second quartile is the area within two standard deviations of the mean. The third quartile is the area within three standard deviations of the mean. O The first quartile is the median of the lower half of the data below the overall median. The second quartile is the overall median. The third quartile is the median of the upper half of the data above the overall median. O The first quartile is the area that contains the 25% of all values that are closest to the mean.
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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