Important Questions for Class 9 Maths Chapter 14 Statistics PDF

Important Questions for Class 9 Maths Chapter 14: Chapter 14 of Class 9 Maths focuses on "Statistics," an important topic that helps students understand how to collect organize and interpret data effectively. Some important questions from this chapter include finding the mean, median and mode of given data sets, understanding the concept of cumulative frequency, and constructing and interpreting frequency distribution tables and histograms.

Class 9 Maths Chapter 14 Important Questions

CBSE Important Questions for Class 9 Maths Chapter 14 PDF

Download Important Questions for Class 9 Maths Chapter 14 PDF

Question 1 . Give three examples of data which you can get from your day-to-day life.

Solution:

• The number of boys in a sports team.
• Electricity bills for last one year.
• The number of students appearing for board exams at your school.

Question 2 . The height of 20 students of class V are noted as follows

4, 4.5, 5, 5.5, 4, 4, 4.5, 5, 5.5, 4, 3.5, 3.5, 4.2, 4.6, 4.2, 4.7, 5.5, 5.3, 5, 5.5.

1. Make a frequency distribution table for the above data.
2. Which is the most common height and which is the rarest height among these students?

Solution:

Question 3: The number of family members in 10 flats of society are

2, 4, 3, 3, 1,0,2,4,1,5.

Find the mean number of family members per flat.

Solution :

Question 4.The following is the list of number of coupons issued in a school canteen during a week:

105, 216, 322, 167, 273, 405 and 346.

Find the average no. of coupons issued per day.

Solution:

Question 5. The daily minimum questions solved by a student during a week were as under:

Find the mean.

Solution:

Question 6.If the mean of six observations y, y + 1, y + 4, y + 6, y + 8, y + 5 is 13, find the value of y.

Solution:

Question 7. The mean weight of a class of 34 students is 46.5 kg. If the weight of the new boy is included, the mean is rises by 500 g. Find the weight of the new boy.

Solution:

Question 8.The Number of books issued to 13 students in a class are:

25, 19, 24, 23, 29, 31, 19, 20, 22, 26, 17, 35, 21.

Find the median no. of books for the above data.

Solution:

Question 9.The weight (in kg) of 7 students of a class are 44, 52, 55, 60, 50, 49, 45.

Find the median weight.

Solution:

Benefits of Practicicng Important Questions for Class 9 Maths Chapter 14

Enhanced Understanding : By working through important questions, students deepen their comprehension of statistical concepts such as mean, median, mode and graphical representation of data.

Improved Problem-Solving Skills : Regular practice helps students develop and refine their problem-solving abilities. They learn to approach questions systematically making them more confident in their ability to handle different types of problems.

Exam Preparation : Focusing on important questions allows students to familiarize themselves with the exam format and types of questions that may appear. This targeted preparation can lead to better performance in assessments.

Time Management : Practicing these questions can help students improve their time management skills during exams. By simulating exam conditions they can learn how to allocate their time effectively for each question.

Identification of Weak Areas : Working through a variety of important questions enables students to identify areas where they may struggle. This self-awareness allows them to seek help or focus their study efforts more effectively.

Boosted Confidence : As students successfully solve important questions, their confidence in their mathematical abilities grows. This positive reinforcement can motivate them to tackle more challenging problems.