There are two sets of numbers: Set A is 5, 5, 5, 5. and Set B is 4, 5, 6, 7. Without doing any calculations, what can you say about the standard deviations of the two sets of numbers? 1. Sets A and B have about the same standard deviation. 2. The only way to compare the standard deviations is to calculate them. 3. Set A has a smaller standard deviation. 4. Set B has a smaller 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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