get the standard deviation in the simplest possible way. Interval 20-26 27-33 34-40 41-47 48-54 55-61 62-68 Frequency 2 2 3 4 14 35 39 MidPoint 23 30 37 44 51 58 65
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.
|
Interval |
20-26 |
27-33 |
34-40 |
41-47 |
48-54 |
55-61 |
62-68 |
|
|
Frequency |
2 |
2 |
3 |
4 |
14 |
35 |
39 |
|
|
MidPoint |
23 |
30 |
37 |
44 |
51 |
58 |
65 |
|
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