For the data set: xi: 15 16 17 18 19 20 ni: 2 5 10 25 6 2 a) find the mean, median, mode, and quartiles; b) draw the box plot and indicate the outliers if any.
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.
1. For the data set:
xi: 15 16 17 18 19 20
ni: 2 5 10 25 6 2
a) find the mean,
b) draw the box plot and indicate the outliers if any.
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