a training program are grouped into the following frequency distribution. Estimate the mean and median, and determine the modal class. Age Frequency (f)(f) 20 to under 22 16 22 to under 24 9 24 to under 26 11 26 to under 28 12 28 to under 30 10 30 to under 32 15 A.Mean: Round to 2 decimal places B. Median: C. Modal class:
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 ages of a sample of 73 applicants for a training program are grouped into the following frequency distribution. Estimate the mean and
| Age | Frequency (f)(f) |
|---|---|
| 20 to under 22 | 16 |
| 22 to under 24 | 9 |
| 24 to under 26 | 11 |
| 26 to under 28 | 12 |
| 28 to under 30 | 10 |
| 30 to under 32 | 15 |
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