How to Work out the Modal Class Interval from a Grouped Frequency Table
Find the Modal Class of the Frequency Table. Class Frequency 12 ? 14 4 15 ? 17 5 19 ? 21 9 22 ? 24 2 Class Frequency 12 - 14 4 15 - 17 5 19 - 21 9 22 - 24 2. The modal class (mode class) is the class with the highest frequency. In this case, the highest frequency is 9 9, which is the frequency for class . Calculating the mean and modal class for grouped data is very similar to finding the mean from an ungrouped frequency table, although you do not have all the information about the data within the.
According to Professor James Jones of Richland Community College, the modal class in statistics, commonly called the mode, is modwl raw data unit that occurs most often within a data set.
This is a part of descriptive statistics, as it is the frequency of data. To find the single most frequent score or the most frequent group of scores in a raw data set, researchers use stem-and-leaf plots, database management programs, statistical programs or count by hand.
Bow studies produce fjnd numerical kodal. Researchers transform information from qualitative studies into categories that researchers then fin as frequencies. As a description of how to play co op in dead island offline data, the mode does not make inferences or predictions about the frequency of the data in a population.
It provides information on the specific sample. This allows researchers to quickly assess the most common answer to a question or the most frequent choice in a study for preliminary analysis. The other measures of central tendency include the mean and the median. The mean is the average in the data set. A simple calculation for the mean is to add all the integers and divide by the number of total integers in the sample.
To find the median, or middle number, the data set must be in numerical order. Then researchers divide the total number of integers by two to find the middle position. What Is Modal Class in Statistics? More From Reference. What Is Product Orientation? What Is Delimitation in Research?
Mean, median, mode and range
Finding the modal class from a grouped frequency table is actually quite easy to do. All you need to do is to look for the group that has the highest frequency. This is because the mode is the number that comes up the most times.
Make sure you write the group down and not the frequency. If you do this you will not score any marks. In most exams finding the modal class will only be worth one mark as there is no working out to show.
So just remember to look for the group with the highest frequency. The frequency table shows the weights of some patients a doctors surgery. Write down the modal class interval.
So all you need to do is look for the group that contains the highest frequency. There were 45 people who had a weight between 75kg and 95kg so this will be the modal group. The frequency table shows the race times of a group of athletes who took part in a m race. Work out the modal class interval for these race times. Like the last example all you need to do is look at the frequency column and pick out the group that contains the highest frequency.
However, in this example there are two groups with the same frequency — 9 people completed the race in a time 50 seconds up to 55 seconds and also 9 people completed the race in a time 55 up to 60 seconds. Therefore, there are two modal classes known as bimodal. So as you can see working out the modal class interval is very quick and easy to do. However, working out the mean and median can be harder to work out see below for help on finding the mean and median from a frequency table.
Answer: You will be looking for the group with the highest frequency. So this will be the group corresponding to Answer: It will be the group containing the highest frequency, so since 8 is the highest frequency then it will be this group. Answer: It will be the score with the highest frequency. So since 40 is the highest frequency, then it will be the group corresponding to this number. Question: What is the modal class interval if the frequency numbers are 3, 6, 10, 12, 9? Question: What is the modal class if the frequency numbers are 18, 20, 22 , 24 ,26?
Answer: The modal group is the group containing the largest frequency which is the group corresponding to Question: How should we deal with a question that involves two modal class intervals?
Question: What is the modal class if the frequency numbers are 7,3,3,5,3,7,2? Kindly explain how to compute for the mean.
To work out the mean you will need to multiply the midpoint of each group by the frequency, add this column up, and divide the answer by the total frequency. Answer: It will the weight which matches with the 6, as 6 is the highest frequency number. Answer: Neither of them, the modal is the group which has the highest frequency number. Question: What is the modal class if frequency numbers are 1, 3, 8, 11, 11, 9, 5 and 2?
Question: What is the modal class if the frequency numbers are 5, 8, 12, 13, 11? What was highest mark scored in the history test? Question: What is the modal class interval if the frequency numbers are 2,8,9,7,4? Answer: The modal group is the one which has the highest frequency associated with it. Answer: Look for the highest frequency in the table, and the group or value corresponding to this will be the mode.
Question: What is the modal class if the frequency numbers are 12,10,16,20,18,14,6,4? Answer: 20 is the largest number, so the group corresponding to the 20 in the frequency table will be the modal class.
According to the example given, the classes are like this , , , lets say for instance someone weighs 50kgs, will that person be in the class of or in the class of ? I initially thought that classes should be like this ,, etc, this helps to avoid members to belong to more than 1 class. Please kindly assist. Marine Biology. Electrical Engineering.
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