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Mean = a + (∑fidi/∑fi)= 135 + (140/68)= 135 + 2. Let us now see the type of elementary questions candidates can expect in various competitive examinations. Prepare a table of the above collection. Also, find probability questions here at BYJU’S. Statistics questions based on CBSE syllabus and NCERT guidelines are provided here for students.

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Thank you sirLikeLikeFill in your details below or click an icon to log in:Connecting to %s Notify me of new comments via email. 967)Mean = 47. (a) Construct a scatter graph with this data. Also, it will help them to participate in competitive exams.

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ii) Median is the middle value of a set of observations. 5. 2.

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Worked SolutionThe following table contains data collected from an experiment. 3. Here, the lower class limit is 31 and the upper class limit is 40. Question 3: The marks of 13 students in an examination are 55, 65, 72, 94, 64, 68, 54, 62, 58, 75, 80, 82, 60.

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Solution:Let us find the mean of the given data. Histogram: A set of rectangles with bases along with the intervals between class boundaries and with areas proportional to frequencies in the corresponding classes. In this, we are going to discuss the important statistical concepts, such as grouped data, ungrouped data and the measures of central tendencies like mean, median and mode, methods to find the mean, median and mode, the relationship between them with more examples. Worked SolutionIf you would like space on the right of the question to write out the solution try this Thinning Feature.

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In 700 BC, Roman Empires used statistics by conducting registration to record population for the purpose of collecting taxes. 77= 135. (a) Explain why this is a biased survey. (c) Find an estimate of the mean time visitors took watching the octopus. Worked SolutionThe charts below show the results of pupils in a Year Group answering twenty mental arithmetic questions. (a) Find the median number of minutes spent travelling to work.

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The workers earn a salary of Rs. Find the mean daily wages of the workers of the factory by using an appropriate method. #The solutions to the questions on this website are only available to those who have a Transum Subscription. Find the value of k. (f) Find the value of b. .

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Find the value of p . Tip # 8: Class Mark The mid value (average value) of a class interval is called the class mark of that class. getElementById( “ak_js_1” ). Step 1: Identify the median class. Worked SolutionA data set has \(n\) items.

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. 05Median = 137Mode = 135. Check the following frequency distribution table, consisting of weights of 38 students of a class:36 4041 45 46 5051 5556 6061 65 66 70 71 75514312211(i) What is class-interval for classes 31 35?(ii) How many students are there in the range of 41-45 kgs?Solution:(i) Class interval = Upper class limit lower class limit= 35-31= 4(ii) For the 41-45 range, there are 14 students. For ungrouped data, the mode can be found out by counting the observations and using tally marks to construct a frequency table.

click here for info Statistics – Questions on Mean, Mode and Median Related ContentTop CommentsHey very nice web site!! Man . Tip # 3: Cumulative Frequency It is the sum of frequencies of a class and all the classes below it.

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03 cm. In modern times, statistical methods have been used to record and predict such things as birth and death rates, employment and inflation rates, sports achievements and other economic and social trends. (a) Plot points representing this data on the coordinate grid below. To know more about Central Tendency, visit here.

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(f) Find the value of \(a\) and of \(b\)(g) Write down the modal class. .