## NCERT Solutions for Class 10 Maths Chapter 14 Statistics (Ex 14.2) Exercise 14.2

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1. What is statistics?

Statistics is considered as a subject which is concerned with collection, organisation, analysis, interpretation and presentation of data. Statistics is used in different fields for data analysis purposes. People who are using statistics for data analysis and interpretation must have some technical and cognitive skills to achieve maximum success in his/her work. The government uses statistics in the census and for calculating or measuring different indicators that affect the economy of the country — indicators such as unemployment, stock market, etc. Statistics is not an easy task. One needs a lot of experience to complete it in an efficient and productive way.

2. What is the importance of NCERT Solutions?

Mathematics is a subject where a student can score good, but it turns out to be difficult for some students who are not acquainted with the concepts and basics. Here, NCERT Solutions are the only option that can save students from failing the exams. NCERT Solutions for exercises of different chapters of Mathematics provide some quality solutions to every question in the exercise; thus, by preparing these solutions, the students can gain maximum experience and score better marks in the final exams. NCERT Solutions have proved to be very productive in student's preparation for their final exams.

3. How much time do students need to complete Exercise 14.2 Of Class 10 Mathematics?

Providing at least one hour completely to the Exercise 14.2 Chapter 14 Class 10 Maths would be enough for the student to complete and understand the concepts. But, it is also to be remembered that continuous practice would help the student attain the desired results. Therefore it is advisable that the student come back to the exercise time and again and practice the numericals to get a better hold of the concepts. To make the studying process easier, the students can refer to the NCERT Solutions which they can easily download from the website of Vedantu.

4. What is ungrouped data?

Data that is usually represented in its original or raw form and where the observations are not classified into groups is called ungrouped data. For instance, if the teacher of a kindergarten writes down the ages of her students in the following manner, then it gets called an ungrouped data

5, 3, 4, 3, 5, 4, 4, 3, 4, 4, 3, 3, 3, 4, 3, 27 .

It is easier to analyze and work upon ungrouped data if the set is small and limited. But it becomes a hassle if the set is in a larger quantity.

5. What is the direct method of finding the mean?

To find the mean through the direct method, the following steps are to be considered

The first step includes the classification of the data into intervals in addition to finding the corresponding frequency of each class.

The next step includes the finding of the classmark by considering and taking into account the midpoint of the upper-class limits and the lower class limits.

The third step includes the grouping and tabulating of the product of the class mark and its corresponding frequency for each class. Their sum is also to be calculated.

The last step involves dividing the acquired sum by the sum of the frequencies in order to attain the mean.

6. How to find the mean using the assumed mean method?

To find the mean using the assumed mean method, the following steps are to be taken into account:

The first step involves the classification of the data into intervals and finding out the corresponding frequency of each class.

The next step includes the finding of the classmark by considering the midpoints of the upper-class limits and the lower class limits.

The third step involves considering one of the ‘s as the assumed mean.

The next one needs to find out the derivation of “a” from each of the xi.

di=xi-a′

The final step involves finding out the mean of the deviations and calculate the mean

7. Are the NCERT Solutions available for Class 10 Maths Chapter 14?

Yes, the NCERT Solutions are easily feasible for Class 10 Maths Chapter 14 and can be downloaded from the Vedantu website or from the Vedantu app at free of cost. These solutions are devised by experts keeping in mind the needs and requirements of the students. Every exercise that these solutions contain have detailed and explained answers that make the learning process smoother and simpler for the students. With the regular and adequate practice of these exercises, the student will be able to solve any question that gets asked from this chapter.