In these Class 8 Maths Chapter 9 Question Answer lessons, we will learn how to determine the mode of a given set of data. We will also compare between mode, mean, and median. In statistics, mode, median and mean are typical values to represent a pool of numerical observations. They are calculated from the pool of observations. Mode is the most common value among the given observations. For example, a person who sells ice creams might want to know which flavor is the most popular.
Median is the middle value, dividing the number of data into 2 halves. Mean is the average of all the values. For example, a teacher may want to know the average marks of a test in his class. The following diagrams show how to find the mean, median, mode and range. Scroll down the page for examples and solutions. The mode of a set of observations is the value that occurs most frequently in the set.
A set of observations may have no mode, one mode or more than one mode. Example: Find the mode of the following set of scores. Solution: The mode is 11 because 11 occurred more times than the other numbers. If the observations are given in the form of a frequency table, the mode is the value that has the highest frequency.
Example: Find the mode of the following set of marks. Solution: The marks 2 and 3 have the highest frequency. So, the modes are 2 and 3. Note: The above example shows that a set of observations may have more than one mode. Example: Find the mode for each of the following frequency tables: The frequency table below shows the weights of different bags of rice. There are 8 number cards with values 0 � 7. Each time a card is drawn at random and the card value is recorded. The frequency refers to the number of times a value is shown.
Solution: a Mode: 75 kg highest frequency of 12 b Mode: 5 highest frequency of Example: The following frequency table shows the marks obtained by students in a quiz. Given that 4 is the mode, what is the least value for x? Solution: x is as least 12 if x is less than 12 then 4 will not be the mode. This lesson shows you how to find the mean, median, mode, range and interquartile range for a list of numbers.
Example: Find the mean, median, mode, range and interquartile range for the following data. This lesson shows you how to find the mean, median, mode, range and interquartile range from a frequency table.
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