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the chart below shows the average number of movies seen per person in the selected country!

use equal intervals to make a frequency table for the average number of movies per person.

Classes           Frecuency        

0.0 - 0.9                    1                  

1.0 - 1.9                      5            

2.0 - 2.9                    5

3.0 - 3.9                    2  

4.0 - 4.9                    1

Step-by-step explanation:

The scale of equal intervals is characterized by a common and constant unit of measure that assigns a number equal to the number of units equivalent to that of the magnitude of the observed element. It is important to note that the zero point in the scales of equal intervals is arbitrary, and does not reflect at any moment absence of the magnitude that we are measuring.

This scale, besides having the characteristics of the ordinal scale, we find that the assignment of the numbers to the elements is so precise that we can determine the magnitude of the intervals (distance) between all the elements of the scale. Undoubtedly, we can say that the scale of intervals is the first truly quantitative scale and the characters that have this scale can be calculated all the statistical measures except the coefficient of variation.

The data is classified into classes divided into equivalent intervals. The range is then divided by the number of classes, which gives the common difference.

1. Define the number of equals intervals .

Each interval increase 0.9.

2. Make a frecuency table.

We select each country which is within the range of each class and we add in the frecuency column the countries that fall within the range of that class.

Classes           Frecuency        

0.0 - 0.9                    1                  

1.0 - 1.9                      5            

2.0 - 2.9                    5

3.0 - 3.9                    2  

4.0 - 4.9                    1

i found two solutions,   n = 2 • ± √3 = ± 3.4641

step-by-step explanation: