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Question 15 Marks
Discuss the types of Central Tendency.
Answer
  • First preliminary information is obtained if required for any study.
  • Some units are covered to get information.
  • The set of all these units is called the 'Population of the study'.
  • The total number of units in this aggregate is called the 'Size of the population'.
  • The information collected is tabulated using a questionnaire.
  • The statistics in this table have some features.
  • This information is verified using statistical methods.
  • Such a probe finds a measure that summarizes observations of information.
  • In the observations of the data the value representing this measure is between or in the middle of the minimum and maximum values.
  • Hence they are called ‘intermediate conditions’.
  • They can also be called 'average'.
  • There are three measurements of averages in general usage:
1. Mean, 2. Median and 3. Mode.
1. Median:
  • The value obtained by summing all the observations of the information and dividing that sum by the total number of observations is called median.
  • Medium Search Formula:
$\bar{\mathrm{x}}$ = $\frac{\sum \mathrm{x}_{\mathrm{i}}}{\mathrm{n}}$
2. Moderator:
  • Intermediate position is a method of measuring.
  • It simply means 'in the middle' or 'in the middle' measure.
  • The size of the median is in the middle of all observations.
  • Hence it is known as the moderator.
  • The median is the value that divides the total observations into two equal parts.
  • Moderator search formula:
  • M = {(n + 1) / 2}, the value of the score
  • This formula is used when the observations are in even numbers.
  • But if the number of observations is odd, the following formula is used:
  • M = (value of observation of m + (m + 1) value of observation) / 2
3. Polymer:
  • The value of an observation that is repeated more than once in a statistical observation is called a multiplier.
  • It is denoted by the English alphabet 'Z'.
  • There may be more than one observation in response.
  • Numerical information that has a single polymer is called polynomial information and information that has two polymers is called binary-polynomial information.
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Question 25 Marks
Classify the graphs and explain them.
Answer
  • Graphs are classified as follows according to the form of information shown in the graph:
1. One dimensional graph:
  • This section includes line and column graphs.
2. Two-dimensional graph:
  • This section includes graphs with geometric shapes such as circles, squares and rectangles.
3. Three-dimensional graph:
  • This section contains graphs showing diagrams of black piles, solid spheres, solid squares, etc.
4. Graphic and other graphs:
  • This section includes graphics showing graphics and cartograms.
  • The detail in this method is indicated by the symbol of the picture.
  • For example, a human mark can be given to indicate the population of a region.
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Question 35 Marks
State the main stages of statistical analysis.
Answer
  • The collected statistics are analyzed in two stages:
(1) Collection of Data and (2) Classification of Data.
  • Stages of statistical analysis:
(1) As much accuracy as possible should be maintained when collecting statistics.
  • Statistics obtained with low accuracy lead to incorrect results.
(2) The data obtained is first edited and then classified.
(3) Issues like duration, regionalism, quality, comprehensiveness etc. are taken into consideration while classifying.
(4) The figures obtained are presented in their final form.
  • Statistics are presented in a variety of forms.
(5) Intermediate conditions, correlation and relativity, indicative number etc. Many statistical methods are used.
(6) The information collected is first organized into different tables. They are then analyzed using statistical methods.
(7) Information is collected for various purposes.
  • In order for the collected information to be used properly, the statistical information has to be converted into the correct form first.
  • This action is called 'tabulation'.
  • The necessary compartments are prepared
  • Such a table is called a 'table'
  • It contains statistics.
(8) Putting the statistics in the right box makes it easier to get a comprehensive idea of ​​all the details.
  • Different details can also be compared based on it.
(9) In the next stage this figure is represented by various graph methods.
  • Creating graphs makes it easier to interpret statistics.
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