The weights in milligram of 2538 seeds of the long pine is represented by the following frequency distributed data; Weights (milligrams) Number of Seeds 10-24 16 25-39 68 40-54 204 55-69 233 70-84 240 85-99 655 100-114 803 115-129 294 130-144 21 145-159 4
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 weights in milligram of 2538 seeds of the long pine is represented by the following frequency distributed data;
|
Weights (milligrams) |
Number of Seeds |
|
10-24 |
16 |
|
25-39 |
68 |
|
40-54 |
204 |
|
55-69 |
233 |
|
70-84 |
240 |
|
85-99 |
655 |
|
100-114 |
803 |
|
115-129 |
294 |
|
130-144 |
21 |
|
145-159 |
4 |
Find the following measurements for the aforementioned frequency distribution
- Arithmetic
Mean Median - All
quartiles - 3rd& 7th Deciles
- 24th& 46th Percentile
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