Important Notes of complete Chapter 4 Statistics Class 11 Notes written by Professor Mr. Faraz Qasir Suib. These notes are very helpful in the preparation of Chapter 4 Statistics Class 11 Notes for the students of the intermediate and these are according to the paper patterns of all Punjab boards.
Summary and Contents:
Topics which are discussed in the notes are given below:
- Our comprehensive class 11 statistics chapter 4 solutions will ensure you're fully prepared for your exams.
- Write any two advantages of the range
- What are the demerits of range?
- Define relative dispersion.
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- What is quartile deviation?
- Write down the merits of quartile deviation.
- Write down the demerits of quartile deviation.
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- Define mean deviation
- Properties of mean deviation.
- Write down the merits of mean deviation.
- Write down the demerits of mean deviation.
- By Reading class 11 statistics chapter 4 notes pdf explore detailed explanations and examples to enhance your understanding.
- Write any two properties of standard deviation.
- Give two properties of variance.
- Given that mean = 156.17, median = 153.50 and standard deviation = 19.03. Calculate coefficient of skewness.
- What is the use of coefficient of variation?
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- What do you say about the relative dispersion of 5, 5, 5 and 5?
- If S 2 = 36 and X = 18, what is coefficient of variation?
- If variance of the value of โXโ is 25, what is the standard deviation of X?
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- If S.D(X) = 10, then find the standard deviation of 5X?
- What is meant by symmetry?
- What are the types of measures of dispersion?
- These class 11 statistics chapter 4 questions and answers are perfect for quick revisions before your exams.
- Define the term variance.
- For a symmetrical distribution S.D. = 2. What is value of 4th moment about mean for mesokurtic data?
- What do you know about kurtosis?
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- If b2 = 3 and m4 = 1875, then what will be the standard deviation?
- What is meant by absolute dispersion?
- Write four measures of relative dispersion.
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- Write down the Bowleyโs and Karl Pearsonโs formula of coefficient of skewness.
- Calculate lower quartile from the given data: 13, 3, 7, 15, 17, 5, 23
- Compute coefficient of quartile deviation if ๐ธ๐ = ๐๐. ๐๐ and ๐ธ๐ = ๐๐. ๐
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- Define standard deviation.
- What is meant by dispersion?
- Define measure of dispersion.
- What is the range of Bowleyโs coefficient of skewness?
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- What are the measures of absolute dispersion?
- S.D. of a distribution is 4. Find second moment about mean.
- These class 11 statistics chapter 4 exercise solutions are designed to simplify your study sessions.
- Introduction to Measure of Dispersion: The measure of central tendency does not tell us any thing about the spread of the values in a set, because any two sets with vast difference in magnitude of their variability may have the same central tendency. Look at the following two data sets:
- Data set a: 8,7,5,8,6 Data set b: 1, 4, 7, 10, 12
- These two data sets have same mean 6.8 but differ in their variations from the central value. There is more variation in the date set b as compared to the data set a. This illustrates the fact that measure of central tendency is not sufficient.
- To give a sensible description of data, a numerical quantity called measure of dispersion or variability that describes the spread of the values in a set of data is required.
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- Two types of measures of dispersion or variability are defined:
- i) Absolute measures ii) Relative measures
- The absolute measures are defined in such a way that they have units (meters, grams etc) same as those of the original measurements, whereas the relative measures have no units as these are ratios.
- Here are the detailed class 11th statistics chapter 4 important questions to help you prepare for your exams.
- The most common measures of absolute variability are:
- a) Range b) Quartile Deviation c) Mean Deviation d) Variance e) Standard Deviation
- These are also called measures of dispersion or measures of spread.
- The relative measures are discussed in article 4.2