{"id":26541,"date":"2021-06-26T11:57:55","date_gmt":"2021-06-26T06:27:55","guid":{"rendered":"https:\/\/mcq-questions.com\/?p=26541"},"modified":"2022-03-02T10:47:32","modified_gmt":"2022-03-02T05:17:32","slug":"ncert-solutions-for-class-9-maths-chapter-14-ex-14-2","status":"publish","type":"post","link":"https:\/\/mcq-questions.com\/ncert-solutions-for-class-9-maths-chapter-14-ex-14-2\/","title":{"rendered":"NCERT Solutions for Class 9 Maths Chapter 14 Statistics Ex 14.2"},"content":{"rendered":"

These NCERT Solutions for Class 9 Maths<\/a> Chapter 14 Statistics Ex 14.2 Questions and Answers are prepared by our highly skilled subject experts.<\/p>\n

NCERT Solutions for Class 9 Maths Chapter 14 Statistics Exercise 14.2<\/h2>\n

Question 1.
\nThe blood groups of 30 students of class VIII are recorded as follows:
\nA, B, O, O, AB, O, A, O, B, A, O, B, A, O, O,
\nA, AB, O, A, A, O, O, AB, B, A, O, B, A, B, O.
\nRepresent this data in the form of a frequency distribution table. Which is the most common and which is the rarest blood group among these students.
\nSolution:
\nThe frequency distribution table of the following data is as:
\n\"NCERT
\nThe most common blood group is O, and the rarest blood group is AB among the students.<\/p>\n

\"NCERT<\/p>\n

Question 2.
\nThe distance (in km) of 40 female engineers from their residence to their place of work was found as follows:
\n\"NCERT
\nConstruct a grouped frequency distribution table with class size 5 for the data given above, taking the first interval as 0-5 (5 not included). What main features do you observe from this tabular representation?
\nSolution:
\nUpper limit = 32
\nLower limit = 2
\nRange = 32 – 2 = 30
\n\"NCERT
\nWe observe that more than 60% of female engineers’ residence to their place of work were less than 15 km.<\/p>\n

Question 3.
\nThe relative humidity (in %) of a certain city for a month of 30 days was as follows:
\n\"NCERT
\n(i) Construct a grouped frequency distribution table with classes 84 – 86, 86 – 88 etc.
\n(ii) Which month or season do you think this data is about?
\n(iii) What is the range of this data?
\nSolution:
\n(i) Upper limit = 99.2
\nLower limit = 84.9
\nRange = 14.3
\n\"NCERT
\n(ii)The given data is to be taken in the rainy season as the relative humidity is high.
\n(iii) The range of this data is 99.2 – 84.9 = 14.3<\/p>\n

\"NCERT<\/p>\n

Question 4.
\nThe height of 50 students, measured to the nearest centimeter have been found to be as follows:
\n\"NCERT
\n(i) Represent the data given above by a grouped frequency distribution table, taking the class intervals as 160 – 165, 165 – 170, etc.
\n(ii) What can you conclude about their height from the above table.
\nSolution:
\n(i) Upper limit = 173
\nLower limit = 150
\nRange = 173 – 150 = 23
\n\"NCERT
\n(ii) One conclusion that we can draw from the above table is that more than 50% of students are shorter than 165 cm.<\/p>\n

Question 5.
\nA study was conducted to find out the concentration of sulphur dioxide in the air in parts per million (ppm) of a certain city, The data obtained for 30 days is as follows:
\n\"NCERT
\n(i) Make a grouped frequency distribution table for this data with class intervals as 0.00 – 0.04, 0.04 – 0.08, and so on.
\n(ii) For how many days, was the concentration of sulphur dioxide more than 0.11 parts per million?
\nSolution:
\n(i) Upper limit = 0.22
\nLower limit = 0.01
\nRange = 0.21
\n\"NCERT
\n(ii) The concentration of sulphur dioxide was more than 0.11 ppm for 8 days.<\/p>\n

\"NCERT<\/p>\n

Question 6.
\nThree coins were tossed 30 times simultaneously. Each time the number of heads occurring was noted down as follows:
\n\"NCERT
\nPrepare a frequency distribution table for the data given above.
\nSolution:
\nThe frequency distribution table of the given data is
\n\"NCERT
\n\"NCERT<\/p>\n

Question 7.
\nThe value of \u03c0 upto 50 decimal places is given below:
\n3.14159265358979323846264338327950288419716939937510
\n(i) Make a frequency distribution of the digits from 0 to 9 after the decimal point.
\n(ii) What are the most and the least frequently occurring digits?
\nSolution:
\n(i) Frequency distribution table of the digits after the decimal point is:
\n\"NCERT
\n(ii) The most frequently occurring digits are 3 and 9. The least occurring digits are 0.<\/p>\n

\"NCERT<\/p>\n

Question 8.
\nThirty children were asked about the number of hours they watched TV programmes in the previous week. The results were found as follows:
\n\"NCERT
\n(i) Make a grouped frequency distribution table for this data, taking class width 5 and one of the class intervals as 5 – 10.
\n(ii) How many children watched television for 15 or more hours a week?
\nSolution:
\nUpper limit = 17
\nLower limit = 1
\nRange = 17 – 1 = 16
\n\"NCERT
\n(ii) Number of children who watched television for 15 or more hours a week is 2 children.<\/p>\n

\"NCERT<\/p>\n

Question 9.
\nA Company manufactures car batteries of a particular type. The lives (in years) of 40 such batteries were recorded as follows:
\n\"NCERT
\nConstruct a grouped frequency distribution table for this data, using class intervals of size 0.5 starting from the interval 2 – 2.5:
\nSolution:
\nUpper limit = 4.6
\nLower limit = 2.2
\nRange = 2.4
\n\"NCERT<\/p>\n","protected":false},"excerpt":{"rendered":"

These NCERT Solutions for Class 9 Maths Chapter 14 Statistics Ex 14.2 Questions and Answers are prepared by our highly skilled subject experts. NCERT Solutions for Class 9 Maths Chapter 14 Statistics Exercise 14.2 Question 1. The blood groups of 30 students of class VIII are recorded as follows: A, B, O, O, AB, O, …<\/p>\n

NCERT Solutions for Class 9 Maths Chapter 14 Statistics Ex 14.2<\/span> Read More »<\/a><\/p>\n","protected":false},"author":9,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"default","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"default","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","spay_email":""},"categories":[6],"tags":[],"yoast_head":"\nNCERT Solutions for Class 9 Maths Chapter 14 Statistics Ex 14.2 - MCQ Questions<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/mcq-questions.com\/ncert-solutions-for-class-9-maths-chapter-14-ex-14-2\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"NCERT Solutions for Class 9 Maths Chapter 14 Statistics Ex 14.2 - MCQ Questions\" \/>\n<meta property=\"og:description\" content=\"These NCERT Solutions for Class 9 Maths Chapter 14 Statistics Ex 14.2 Questions and Answers are prepared by our highly skilled subject experts. 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