Please calculate: Parameters a and b Correlation coefficient Determination coefficient Write correlation equation Visualise data in Scatter chart Provide explanation of results Year Sales, MEUR (Yi) Employees with higher education (Xi) 2010 70 10 2011 90 12 2012 100 15 2013 80 13 2014 110 17 2015 120 20 2016 150 25 2017 200 25 2018 200 25
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.
- Please calculate:
- Parameters a and b
Correlation coefficient - Determination coefficient
- Write correlation equation
- Visualise data in Scatter chart
- Provide explanation of results
|
Year |
Sales, MEUR (Yi) |
Employees with higher education (Xi) |
|
2010 |
70 |
10 |
|
2011 |
90 |
12 |
|
2012 |
100 |
15 |
|
2013 |
80 |
13 |
|
2014 |
110 |
17 |
|
2015 |
120 |
20 |
|
2016 |
150 |
25 |
|
2017 |
200 |
25 |
|
2018 |
200 |
25 |
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