What is the missing value, x, in the 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.
nn psychology students took a standardized test. The scores are summarized in the Grouped Frequency Distribution Table (GFDT) below.
| Scores | Frequency |
| 100 - 109 | 17 |
| 110 - 119 | 16 |
| 120 - 129 | 12 |
| 130 - 139 | x |
| 140 - 149 | 15 |
| 150 - 159 | 46 |
The scores are also described in the cumulative table shown below.
| Scores | Cumulative Frequency |
| less than 110 | 17 |
| less than 120 | 33 |
| less than 130 | 45 |
| less than 140 | 59 |
| less than 150 | 74 |
| less than 160 | n |
What is the missing value, x, in the GFDT?
Trending now
This is a popular solution!
Step by step
Solved in 2 steps
