1. Students in an AP Statistics class participated in an online memory game. All of the students first played the game at Level 1 (the lowest difficulty level), and then played the game again at Level 4 (a higher level of difficulty). The graphs below display the distribution of student scores for the two difficulty levels -- Level 1 and Level 4. 200 400 600 800 1000 1200 Score (a) Use the graphical display above to compare the distribution of student scores for the two difficulty levels (Level 1 and Level 4) of the memory game. Level_4 Level_1
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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