nn psychology students took a standardized test. The scores are summarized in the Grouped Frequency Distribution Table (GFDT) below. Scores Frequency 120 - 124 15 125 - 129 16 130 - 134 15 135 - 139 x 140 - 144 20 145 - 149 37 The scores are also described in the cumulative table shown below. Scores Cumulative Frequency less than 125 15 less than 130 31 less than 135 46 less than 140 63 less than 145 83 less than 150 n What is the missing value, x, in the GFDT? What is the missing value, n, in the cumulative table?
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 |
| 120 - 124 | 15 |
| 125 - 129 | 16 |
| 130 - 134 | 15 |
| 135 - 139 | x |
| 140 - 144 | 20 |
| 145 - 149 | 37 |
The scores are also described in the cumulative table shown below.
| Scores | Cumulative Frequency |
| less than 125 | 15 |
| less than 130 | 31 |
| less than 135 | 46 |
| less than 140 | 63 |
| less than 145 | 83 |
| less than 150 | n |
What is the missing value, x, in the GFDT?
What is the missing value, n, in the cumulative table?
Trending now
This is a popular solution!
Step by step
Solved in 2 steps
