A professor is interested in the differences in class times and the scores on his class quiz. Determine whether class time affects the score on a quiz. Day Afternoon Evening 18 10 11 12 9 14 16 19 24 16 18 17 19 26 27 26 20 19 ΣX2 = 6231
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 professor is interested in the differences in class times and the scores on his class quiz. Determine whether class time affects the score on a quiz.
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Day |
Afternoon |
Evening |
|
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18 |
16 |
19 |
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