There are 3 students that make up the total population of Summer Calculus students at ACM. Their grades on the first test were 80, 55, 57. a) What is the mean of this population? b) What is the variance of this population? c) What is the standard deviation of this population?
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.
There are 3 students that make up the total population of Summer Calculus students at ACM. Their grades on the first test were 80, 55, 57.
a) What is the mean of this population?
b) What is the variance of this population?
c) What is the standard deviation of this population?
The population data is
X = 80 , 55 , 57
n=3
a) What is the mean of this population
66.7 is the mean of this population
Step by step
Solved in 3 steps
