Suppose we have the following scores for a sample of students taking Quiz 1 and Quiz 2: Quiz 1 Quiz 2 8 7 4 6 10 8 3 5 0 7 4 7 10 8 1
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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Suppose we have the following scores for a sample of students taking Quiz 1 and Quiz 2:
Quiz 1 Quiz 2
8 7
4 6
10 8
3 5
0 7
4 7
10 8
1
Using this data and Excel, test to see whether the population variances for the two quizzes are equal or unequal. Use a 0.05 level of significance. Make sure to submit your Excel work.
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