n class A, Jamir got 85 for his first test. Jamir's class mean was 75 and the standard deviation was 5. In class B, Laurabelle got 80 in her first test. Laurabelle's class mean was 50 and the standard deviation was 10. In a fair comparison of the two students in two different classes, who did better in his or her test. (Compare Jamir and Laurabelle's standing in their classes. Note Z-score gives that information.) Jamir Laurabelle Both did the same none of the above
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.
In class A, Jamir got 85 for his first test. Jamir's class mean was 75 and the standard deviation was 5.
In class B, Laurabelle got 80 in her first test. Laurabelle's class mean was 50 and the standard deviation was 10.
In a fair comparison of the two students in two different classes, who did better in his or her test. (Compare Jamir and Laurabelle's standing in their classes.
Note Z-score gives that information.)
- Jamir
- Laurabelle
- Both did the same
- none of the above
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