This data set is reflecting a sample. Calculate the mean, standard deviation, and variance. Apply the general rounding rules given a data set. 13.1 27.3 48 12.6 20.2 16.1 37.2 22 43.6 Make sure that you don't use your rounded answer for the variance to calculate the standard deviation. Sample mean = Sample variance = Sample standard deviation = Let's now assume that the data was actually from a population! Population Standard Deviation =
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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