For the following data: A B 25689 85241 Find the deviation scores for Variable A that correspond to the raw scores of 2 and 8. Find the deviation scores for Variable B that correspond to the raw scores of 5 and 4. Just from looking at these scores, do you think these variable A and B are positively or negatively correlated? Why? Now calculate the correlation. Were you right?
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.
For the following data:
| A | B |
| 2 5 6 8 9 |
8 5 2 4 1 |
- Find the deviation scores for Variable A that correspond to the raw scores of 2 and 8.
- Find the deviation scores for Variable B that correspond to the raw scores of 5 and 4.
- Just from looking at these scores, do you think these variable A and B are positively or
negatively correlated ? Why? - Now calculate the
correlation . Were you right?
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