The following data represent the net profits made by a sample of 25 companies that operate in real-state sector. 56 97 78 61 79 93 84 76 58 92 89 96 42 44 85 77 53 88 62 84 62 82 75 95 89 1- Choose the best graphical presentation and justify your answer. 2- Based on your answer in (1), construct the selected graphical presentation and comment on the results. 3- Based on your answer in (2), do you think the sector performance is satisfactory? Justify your answer.
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.
The following data represent the net profits made by a sample of 25 companies that operate in real-state sector.
|
56 |
97 |
78 |
61 |
79 |
|
93 |
84 |
76 |
58 |
92 |
|
89 |
96 |
42 |
44 |
85 |
|
77 |
53 |
88 |
62 |
84 |
|
62 |
82 |
75 |
95 |
89 |
1- Choose the best graphical presentation and justify your answer.
2- Based on your answer in (1), construct the selected graphical presentation and comment on the results.
3- Based on your answer in (2), do you think the sector performance is satisfactory? Justify your answer.
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