1.) After 4 algebra tests, Alisa has a mean score of 82. One more 100-point test is to be given in this class. All of the test scores are of equal importance. Is it possible for Alisa to raise her average (mean) to 90? Explain. ANSWER: 2.) After 6 math tests, Zia has a mean score of 88. What score does Ruben need on the next test to raise his average (mean) to 90? ANSWER:
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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