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24-25_RM101E Applied Data Analysis
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as of March 20, 2022 revealed the following parameters:
- The Covariance(Xi , Yi) .............. = 12.60
- The Standard Deviation of Xi ...... = 5.25
- The Standard Deviation of Yi ...... = 2.44
====================================
Calculate THE COEFFICIENT OF DETERMINATION
R² = ............... ?
====================================
**** the result rounded to two decimal places ****
A statistical study on the distribution of a sample of "N" people infected with covid-19 in France by age group on January 20, 2022 revealed the following statistical table:
| Age group Xi | rfi |
| [0 ; 16[ | 0,01 |
| [16 ; 46[ | 0,12 |
| [46 ; 66[ | 0,22 |
| [66 ; 76[ | 0,25 |
| [76 ; 86[ | 0,21 |
| [86 ; 100[ | 0,19 |
The Mean age equals =
**** (Round a float value to 3 decimal places)
A statistical study on the Distribution of the numbers of people infected with covid-19 in France by age group on January 20, 2022 revealed the following boxplot parameters:
| boxplot Parameters |
| 0,00 |
| 83,14 |
| 66,91 |
| 98,63 |
| 88,00 |
| 48,50 |
| 100,00 |
Can you help the manager to make the correspondence
between each parameter and its value?
Boxplot Parameters
We can say that :
A statistical study on the distribution of the numbers of people infected with covid-19
in France by age group on January 20, 2022 revealed the following statistical table:
Age Xi | rfi | (ci - mean) |
[0;16[ | 0,01 | -49,42 |
[16;46[ | 0,25 | -26,42 |
[46;66[ | 0,35 | -1,42 |
[66;76[ | 0,16 | 13,58 |
[76;86[ | 0,23 | 23,58 |
THE COEFFICIENT OF VARIATION EQUALS =
*** (Round a float value to 3 decimal places)
A study on the distribution of the numbers of people infected with covid-19 in France
by age group on January 20, 2022 revealed the following boxplot parameters:
| 0 | 100 | 56,18 | 72,14 | 88,10 | 39,00 | 24,00 |
We can say that :
IN DESCRIPTIVE STATISTICS AN " Ogive Chart " IS THE GRAPHIC REPRESENTATION OF:
**************************************************************************
A statistical study on the distribution of a sample of 200 people infected with covid-19
in France by age group on January 20, 2022 revealed the following statistical table:
| Age Xi | (ci - mean)^2 | rfi*(ci - mean) |
| [0;16[ | 2442,34 | -0,49 |
| [16;46[ | 689,02 | -6,61 |
| [46;66[ | 2,02 | -0,50 |
| [66;76[ | 184,42 | 2,17 |
| [76;86[ | 556,02 | 5,42 |
The Standard Deviation equals =
*** (Round a float value to 3 decimal places)
According to the graph below which represents the distribution of the numbers of people infected with covid-19 in France by age group as of January 20, 2022, we can say that:
We can say that::
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