Revision Notes for ICSE Class 9 Mathematics Chapter 19 - Free PDF Download
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FAQs on ICSE Class 9 Mathematics Revision Notes Chapter 19 - Mean and Median
1. Following the concept in Chapter 10 of ICSE Maths, how can we calculate the Median of {3; 14; 86; 2; 67; 19; 29; 1}?
In order to calculate the median we need to follow up through two steps, which are as follows:
Step 1: Arranging them in ascending order we get,
1,2,3,14,19,29,67,86.
Step 2: Since the total number of observations is even, we know that the median will be midway between the two numbers in the middle. So we add the numbers in the middle and divide them by 2.
I.e., \[\frac{14+19}{2}\] = 16.5
Thus, 16.5 is the median.
2. How many Exercises are in Chapter 19 of Class 9 Maths?
Mean and Median contain 3 exercises namely 19(A), 19(B), and 19(C) with 16 questions in the first exercise, 5 questions in the second, and 14 questions in the third one. It is extremely important to practice these questions time and again along with the question bank available at Vedantu, so the students can understand the whole chapter thoroughly making their concepts clear as a day and making sure they get excellent marks which is the goal of us at Vedantu.
3. From where can I download the best and accurate Revision and Practice Material for Class 9 of the ICSE Board for free?
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4. Where in our daily lives do we use Statistics included in Chapter 19 of Class 9 Maths?
Statistics are used everywhere in our lives from medical fields (for example- doctors tracking the development of a baby’s brain) or the weather forecast predictions and to the rise and low in the stock market or its analysis. If we are talking about subtopics in statistics such as the median is used to calculate the average of inconsistently divided data. For example, if we wish to calculate the average salary of people in a city, we can use the median.
5. Following the concept in Chapter 10 of ICSE Maths, how can we calculate the Mean of the numbers 5,8,9,10,13,15?
We wish to calculate the mean of the following numbers: 5,8,9,10,13,15
Step 1: To calculate the mean of these the first step is to note the total number of observations present(n): 6
Step 2: Then we calculate the sum of the numbers given, so we get: 5+8+9+10+13+15= 60
Step 3: We divide the values obtained, such that:
60/6 = 10
So the Mean obtained is 10.