he following data are ages of infants (in months) at which they walked alone. These sample data were obtained from two populations. Sample A 9.8 11 9.5 9.8 10 13 10 14 10 9 10 9.5 Sample B 12 9.5 9.5 14 12 14 13 12 12 14 14 13 Compare the two groups as to their mean, median and mode. Central Tendency A B Mean ____________ ____________ Median ____________ ____________ Mode (s) ____________ ____________ Midrange ____________ ___________
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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