QUESTION 28 Consider the following set of numbers, each of which represents the number of hours of "cramming" that 9 students put in the two days before an exam. 4, 6, 6, 8, 8, 8, 10, 10, 12. What is the variance (S4) of these numbers? Between 2 and 3 hours O Between 3 and 4 hours Between 4 and 5 hours Between 5 and 6 hours
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.
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