The following data show initial training program performance and a job rating by a supervisor 12 months later for a sample 400 employees of a telephone company: Training program perform Job Rating Below average Average Above average Below average 63 49 9 Average 60 79 28 Above average 29 60 23 Is there any relationship between performance in the training program and job rating? Use the 1% level of significance.
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.
b) The following data show initial training program performance and a job rating by a supervisor 12 months later for a sample 400 employees of a telephone company:
Training program perform
Job Rating Below average Average Above average
Below average 63 49 9
Average 60 79 28
Above average 29 60 23
Is there any relationship between performance in the training program and job rating? Use the 1% level of significance.
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