A psychology teacher has given an exam where the highest possible score is 200 points. The mean score for the 30 students in the class is 156 and the standard deviation was 24. Because there was one question that every student answered incorrectly, the teacher decides to add 10 points to every students’ score. After this transformation, what will the mean be?
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.
- A psychology teacher has given an exam where the highest possible score is 200 points. The
mean score for the 30 students in the class is 156 and the standard deviation was 24. Because there was one question that every student answered incorrectly, the teacher decides to add 10 points to every students’ score. After this transformation, what will the mean be?
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