A researcher collected the following data. Which measure of central tendency for each distribution? Explain that it should be calculated a. IQ scores: 60 72 63 83 68 74 90 86 90 86 74 80 b. Error scores: 10 15 18 15 14 13 42 15 12 14 42 c. Blood types: (-A) (-A) (O) (A) (-AB) (A) (O) (O) (O) (AB) D. Graduation grade: B D C A D F C B C D D
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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