Given are five observations for two variables, x and y. 2 3 4 5 Y, 3 85 10 14 (a) Develop a scatter diagram for these data. 18 18 18 15 15 15 15 12 12 12 12 9- 9 9 6- 6- 6 6- 3 3- 3 3 1 2 4 6 1 3 4 5 1 2 3 1 2 3 4 6 (b) What does the scatter diagram developed in part (a) indicate about the relationship between the two variables? O There appears to be no noticeable relationship between x and y. O There appears to be a positive linear relationship between x and y. O There appears to be a negative linear relationship between x and y.
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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