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Consider the following statements: 1. ...

Consider the following statements:
1. The algebraic sum of deviations of a set of values from their arithmetic mean is always zero.
2. Arithmetic mean gt Median gt Mode for a symmetric distribution.
Which of the above statements is/are correct?

A

1 only

B

2 only

C

Both 1 and 2

D

Neither 1 nor 2

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The correct Answer is:
To solve the question, we need to evaluate the validity of the two given statements regarding statistics. ### Step 1: Analyze the First Statement The first statement is: "The algebraic sum of deviations of a set of values from their arithmetic mean is always zero." **Solution:** 1. Let the set of values be \( a_1, a_2, a_3, \ldots, a_n \). 2. The arithmetic mean (average) of these values is calculated as: \[ \text{Mean} = \frac{a_1 + a_2 + a_3 + \ldots + a_n}{n} \] 3. The deviation of each value from the mean is given by: \[ d_i = a_i - \text{Mean} \] 4. Therefore, the algebraic sum of deviations is: \[ \sum_{i=1}^{n} d_i = \sum_{i=1}^{n} (a_i - \text{Mean}) = \sum_{i=1}^{n} a_i - n \cdot \text{Mean} \] 5. Substituting the expression for the mean, we have: \[ \sum_{i=1}^{n} a_i - n \cdot \frac{a_1 + a_2 + \ldots + a_n}{n} = \sum_{i=1}^{n} a_i - \sum_{i=1}^{n} a_i = 0 \] 6. Thus, the algebraic sum of deviations from the mean is indeed zero. **Conclusion:** The first statement is **true**. ### Step 2: Analyze the Second Statement The second statement is: "Arithmetic mean > Median > Mode for a symmetric distribution." **Solution:** 1. In a symmetric distribution, the mean, median, and mode are all equal. 2. Therefore, for a symmetric distribution: \[ \text{Mean} = \text{Median} = \text{Mode} \] 3. This contradicts the statement that states the mean is greater than the median, which is also greater than the mode. **Conclusion:** The second statement is **false**. ### Final Conclusion - The first statement is true. - The second statement is false. Thus, the correct answer is that only the first statement is correct.

To solve the question, we need to evaluate the validity of the two given statements regarding statistics. ### Step 1: Analyze the First Statement The first statement is: "The algebraic sum of deviations of a set of values from their arithmetic mean is always zero." **Solution:** 1. Let the set of values be \( a_1, a_2, a_3, \ldots, a_n \). 2. The arithmetic mean (average) of these values is calculated as: ...
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