Samuel is a kapana vendor at a local open market. His daily income and the number of hours worked for the first six days after the lockdown period are shown below: Day Income (N$) Number of hours 1 800 6 2 900 8 3 600 4 4 1200 5 5 1400 7 6 2000 9 Required question: 1.) Calculate and interpret the correlation coefficient between the random variables Income and Number of hours worked? 2.) and What are some of the key aspects to consider when collecting and preparing data for statistical analysis in order to produce useful information for decision making?
Inverse Normal Distribution
The method used for finding the corresponding z-critical value in a normal distribution using the known probability is said to be an inverse normal distribution. The inverse normal distribution is a continuous probability distribution with a family of two parameters.
Mean, Median, Mode
It is a descriptive summary of a data set. It can be defined by using some of the measures. The central tendencies do not provide information regarding individual data from the dataset. However, they give a summary of the data set. The central tendency or measure of central tendency is a central or typical value for a probability distribution.
Z-Scores
A z-score is a unit of measurement used in statistics to describe the position of a raw score in terms of its distance from the mean, measured with reference to standard deviation from the mean. Z-scores are useful in statistics because they allow comparison between two scores that belong to different normal distributions.
Samuel is a kapana vendor at a local open market. His daily income and the number of hours worked for the first six days after the lockdown period are shown below:
|
Day |
Income (N$) |
Number of hours |
|
1 |
800 |
6 |
|
2 |
900 |
8 |
|
3 |
600 |
4 |
|
4 |
1200 |
5 |
|
5 |
1400 |
7 |
|
6 |
2000 |
9 |
Required question:
1.) Calculate and interpret the
2.) and What are some of the key aspects to consider when collecting and preparing data for statistical analysis in order to produce useful information for decision making?
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