The 20 brain volumes (cm3) from Data Set "IQ and Brain Size" in Appendix B vary from a low of 950 cm³ to a high of 1580 cm3. Use the range rule of thumb to estimate the standard deviation s and compare the result to the exact standard deviation of 155 cm3.
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 20 brain volumes (cm3) from Data Set "IQ and Brain Size" in Appendix B vary from a low of 950 cm³ to a high of 1580 cm3. Use the
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