If you obtained a test score of 78 on a test with an average test score of your class is 70, and SD is 4. If your class have 36 students in total, what is the 95% CI range in estimate the test score of the population [70-2.064*4, 70+2.064*4] [72-2.064*4, 72+2.064*4] [70-2.064*0.67, 70+2.064*0.67] [72-2.064*0.67, 72+2.064*0.67]
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.
- If you obtained a test score of 78 on a test with an average test score of your class is 70, and SD is 4. If your class have 36 students in total, what is the 95% CI
range in estimate the test score of the population
- [70-2.064*4, 70+2.064*4]
- [72-2.064*4, 72+2.064*4]
- [70-2.064*0.67, 70+2.064*0.67]
- [72-2.064*0.67, 72+2.064*0.67]
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