Complete the following table using the sample of 10 IQ scores. Xi Xi - (Xi - )2 91 93 103 69 94 94 120 109 116 99 SS = s2 = s =
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.
1. Complete the following table using the sample of 10 IQ scores.
| Xi | Xi - | (Xi - )2 |
| 91 | ||
| 93 | ||
| 103 | ||
| 69 | ||
| 94 | ||
| 94 | ||
| 120 | ||
| 109 | ||
| 116 | ||
| 99 | ||
| SS = | ||
| s2 = | ||
| s = |
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