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Q: What is class interval size?

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It is the class interval with most number of observations.

class interval GWAPO SI CONRADO CALZADO

The term class interval is used in statistics.

You cannot have a preceding class to the first class. There is no zeroth class.

The class interval is 5.

highest value-lowest value/number of classes

Step 1: Find the midpoint of each interval. Step 2: Multiply the frequency of each interval by its mid-point. Step 3: Get the sum of all the frequencies (f) and the sum of all the fx. Divide 'sum of fx' by 'sum of f ' to get the mean. Determine the class boundaries by subtracting 0.5 from the lower class limit and by adding 0.5 to the upper class limit. Draw a tally mark next to each class for each value that is contained within that class. Count the tally marks to determine the frequency of each class. What is this? The class interval is the difference between the upper class limit and the lower class limit. For example, the size of the class interval for the first class is 30 – 21 = 9. Similarly, the size of the class interval for the second class is 40 – 31 = 9.

The class interval is the maximum possible value in the class less the maximum possible value in the class below. The second is equivalent to the minimum possible value in the class.

90

When observations are grouped into class intervals, the interval that contains the most frequently occurring value is known as the modal class.

class interval - one of several convenient intervals into which the values of the variate of a frequency distribution may be grouped.

Because median is the mid of the class intervals. Therefore, it is a positional measurement. Hence, if the size of class interval increases or decreases then the middle position will also increase or decrease and thus median.

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