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NCERT Solutions For Class 7 Maths Chapter 1 Integers Ex
Maths Class 7 Data Handling Exercise NCERT Solutions are extremely helpful while doing your homework or while preparing for the exam.� Ex Class 7 Maths Question 3. Find the mean of first five whole numbers. Solution: First 5 whole numbers are 0, 1, 2, 3, 4 ? Mean \(=\frac{0+1+2+3+4}{5}=\frac{10}{5}=2\) Hence, the required mean = 2. Ex Class 7 Maths Question 4. A cricketer scores the following runs in eight innings: 58, 76, 40, 35, 46, 45, 0, Find the mean score. Solution: Following are the scores of the runs in eight innings: 58, 76, 40, 35, 46, 45, 0, ? Mean = \(=\frac{\text { Sum of all runs }}{\text { Number of innings }}\) \(\begin{aligned} &=\frac{58+76+40+35+46+45+0+}{8} \\ &=\frac{}{8}= BYJU�S is the world's most valuable ed-tech company and the creator of India�s most loved school learning app that offers� Delivering a world-class learning Byjus Class 6 Maths Chapter 6 Lab experience, programs from BYJU�S is making students fall in love with learning and become self-initiated learners. We have provided Data Handling Class 7 Maths MCQs Questions with Answers to help students understand the concept very well. Students can also refer to NCERT Solutions for Class 7 Maths Chapter 3 Data Handling for better exam preparation and score more marks. Data Handling Class 7 MCQs Questions with Answers. The number of tourists visiting a historical place in a week is shown in the following table: Answer the following related questions.

Data handling refers to the process of collecting, recording and displaying information, for example in graphs or charts, in a way that is beneficial to others.

Data handling is also known as statistics. Data collection using a scheduled technique. Recording data with accuracy and precision. Data analyzing to draw conclusions.

Sharing data in a way that is helpful to everyone. Data collection is a term used to describe a process of planning and gathering data. The aim of the collection of data is to obtain the information to be registered, to make decisions on significant issues, to pass on information to others.

Ex: A teacher has assigned students to collect the average temperature data for the month of February. The only thing the teacher wants is Average data. So, students have to decide at what time daily they have to measure the temperature data. So for these, they have to do proper planning and also they have to gather suitable temperature measuring devices. Data organization refers to the organized arrangement of raw data so that the data can be readily interpreted and further statistical treatment is more convenient.

In the data organisation, we will use Byjus Class 6 Maths Chapter 3 Read tables and charts to show the collected data rather than just giving the raw numbers. This is because the person who is collecting data knows more about the raw data representation if we are showing it to someone they have to easily understand the data representation. So we use tables, graphs and charts to represent the data.

The representative value of a set of measurements is the one that we assume is nearest to the measurement's real value. If we carry out our series of calculations, their average will be the indicative value, except those values that we have shown to be far from the true value. The arithmetic mean is the simplest and most commonly used measurement system used to calculate the mean or average of a data.

It simply involves taking the sum of a number group, then dividing that sum by the number of numbers that are used in the sequence.

Ex: The data of height cm of students in the class is given as follows. Calculate the arithmetic mean. Ans: So to find Arithmetic mean, first we have to calculate the sum of the data. In Statistics, the difference between the largest and the smallest values in the range of a set of data.

Calculate the range. Ans: L To calculate range first we have to find the height of taller students and shorter students in the class. So the taller student height is cm and shorter student height is cm. So the range will be the difference between these two heights. The mode is the value that appears in a data set most frequently. A data set can have one mode, more than one mode, or no mode at all. Calculate the mode. Ans: Here cm is the most frequent height of 3 students.

Therefore the Mode of the following height data set will be cm. In a sorted, ascending or descending, list of numbers, the median is the middle number and may be more representative of that data set than the average. In comparison to the mean, the median is often used when there are outliers in the series that could distort the average of the values.

If there are odd numbers, the median value is the number in the centre, with numbers below and above the same sum. The middle pair must be estimated, added together, and divided by two to find the median value if there is an even number in the set.

Calculate the Median Height. Ans: The total number of students in the class is 10 which is even, so we have added the middle terms i. Therefore the median height of the class is cm. Calculate the Median Weight. Ans: The total number of students in the class is 7. So the middle term of this weight data set will be our Median weight. A bar chart or bar graph is a chart or graph that provides rectangular bars with categorical data with heights or lengths proportional to the values they represent.

It is possible to plot the bars vertically or horizontally. Sometimes, a vertical bar map is called a column chart. Ans: The bar graph representation for the following data is as follows:. Probability is the numerical representations of how likely an occurrence is to occur or how likely a proposition is to be valid. The likelihood of an occurrence is a number between 0 and 1, where 0 indicates the impossibility of the event, roughly speaking, and 1 indicates certainty.

Also, students can practice extra problems which are provided in this PDF to get a thorough knowledge of the subject. Steps in Data Handling Data collection using a Class 5 Maths Chapter 1 Byjus Just scheduled technique. Data Collection Data collection is a term used to describe a process of planning and gathering data.

Organisation of Data Data organization refers to the organized arrangement of raw data so that the data can be readily interpreted and further statistical treatment is more convenient.

Arithmetic Mean The arithmetic mean is the simplest and most commonly used measurement system used to calculate the mean or average of a data. Median In a sorted, ascending or descending, list of numbers, the median is the middle number and may be more representative of that data set than the average. Ex: 1. Representation of Data Using Bar Graphs A bar chart or bar graph is a chart or graph that provides rectangular bars with categorical data with heights or lengths proportional to the values they represent.

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