Directions: Create two stem-and-leaf displays with the test scores presented above. In one stem-and-leaf graph, use CI = 5 and in the other use CI = 10. Scores 46 13 31 25 20 12 11 31 25 31 44 14 5 18 21 41 18 16 26 19 7 30 2 27 24 26 30 11 9 27 35 32 15 29 23 4 38 9 28 20 35 34 18 22 39 8 25 3 27 22
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.
Stem and Leaf
Directions: Create two stem-and-leaf displays with the test scores presented above. In one stem-and-leaf graph, use CI = 5 and in the other use CI = 10.
Scores
46 13 31 25 20
12 11 31 25 31
44 14 5 18 21
41 18 16 26 19
7 30 2 27 24
26 30 11 9 27
35 32 15 29 23
4 38 9 28 20
35 34 18 22 39
8 25 3 27 22
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