Fast solutions for complex problems

What is a reasonable interval size?

For most data, 6 to 15 classes are enough. Class intervals (lengths) should be equal. Intervals such as 0.1, 0.2, 0.5, 1, 2, 5, 10, 20, 50, etc are desirable.

What is the upper limit of class interval 5 15?

Here, all the class intervals are overlapping and the distribution is continuous. 5 and 15 are called the class limits of the class interval 5 – 15: 5 is the lower limit and 15 is the upper limit of the class.

What is the lowest class interval?

The lowest number in a class interval is called the lower limit and the highest number is called the upper limit. This example is a case of continuous class intervals as the upper limit of one class is the lower limit of the following class.

What is the most frequent interval for the test scores?

Mode is the most frequent score or response for a specific variable.

  • Median is the midpoint or mid place.
  • Mean is the sum of the values given to each observation divided by the number of observations the researcher has.
  • Example 1, 1, 2, 4, 7 are 5 numbers that represent the dollars students spent on lunch.
  • What is the size of the class interval?

    2.6. THE SIZE, OR WIDTH, OF A CLASS INTERVAL. The size, or width, of a class interval is the difference between the lower and upper class boundaries and is also referred to as the class width, class size, or class length. If all class intervals of a frequency distribution have equal widths,…

    Which limit is included in class interval?

    In the inclusive series, the upper limit and lower limit are included in that class interval. For example, in illustration, the marks 11 and 20 are included in the class 11-20.

    What is the upper limit of the class 15 to 20?

    The class mark is also known as the class midpoint is the particular point in the middle of the class interval. it is given by , where a= lower limit and b= upper limit. Therefore , the class size and class mark of class 15-20 is 5 and 17.5.

    What is the class mark of 20 30?

    Hence, the class mark for interval 20 – 30 is 25 and for interval 30 – 40 is 35.