What is the mean for the following Grouped Frequency Data Table (GFDT).
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.
| Lower Class Limit | Upper Class Limit | Frequency |
| 30 | 34 | 1 |
| 35 | 39 | 1 |
| 40 | 44 | 2 |
| 45 | 49 | 6 |
| 50 | 54 | 5 |
| 55 | 59 | 11 |
| 60 | 64 | 10 |
| 65 | 69 | 21 |
| 70 | 74 | 13 |
What is the
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