In a small village the sample of ages of 8 persons are given below as 26, 21, 8, 20, 16, 3, 22, 28 Find the co-efficient of variation from the above sample. Also find the z-score and percentile rank for 21. What would be the Q2 in this case.
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.
In a small village the sample of ages of 8 persons are given below as 26, 21, 8, 20, 16, 3, 22, 28 Find the co-efficient of variation from the above sample. Also find the z-score and percentile rank for 21. What would be the Q2 in this case.
Step by step
Solved in 3 steps with 6 images
