What would your semester GPA be if you earned an A in a 3 unit English class and a 4 unit Chemistry class, a B in a 5 unit Math class, and a C in a 3 unit History class?
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.
Weighted Mean
Note: When different data values (?) are assigned different weights (?), we can compute a weighted mean.
?̅= ∑(? ∙ ?)
∑ ?
Your GPA is computed as a weighted mean. The weights are the units/credits and the values are as
follows:
An A is worth 4 pts, B 3pts, C 2pts, D 1 pt, F 0pt
1) What would your semester GPA be if you earned an A in a 3 unit English class and a 4 unit Chemistry
class, a B in a 5 unit Math class, and a C in a 3 unit History class?
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