The table below shows the data on Covid 19 cases recorded in country B. Age 50 - 55 45 - 50 40 - 45 35 - 40 30 - 35 25 – 30 20 – 25 Cases 25 30 40 45 170 110 80 Find the values of the following The mean The median
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.
- The table below shows the data on Covid 19 cases recorded in country B.
|
Age |
50 - 55 |
45 - 50 |
40 - 45 |
35 - 40 |
30 - 35 |
25 – 30 |
20 – 25 |
|
Cases |
25 |
30 |
40 |
45 |
170 |
110 |
80 |
Find the values of the following
- The mean
- The
median
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