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Calculate the Pearson's index of skewness. (Round the mean, median and standard deviation to one decimal place and Pearson's index to two decimal places.) \[ \mathrm{PI}=0.27 \] It can be concluded that the distribution is not significantly \( \mathbf{T} \) skewed.

Ask by Reed Park. in the United States
Mar 08,2025

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The Pearson's index of skewness is 0.27, which indicates that the distribution is not significantly skewed.

Solución

1. First, recall the formula for Pearson's index of skewness: \[ \text{PI} = \frac{3(\bar{x} - \text{Median})}{s} \] where: - \(\bar{x}\) is the mean, - \(\text{Median}\) is the median, and - \(s\) is the standard deviation. 2. The mean, median, and standard deviation are each rounded to one decimal place. After substituting those rounded values into the formula and performing the calculation, the result obtained is: \[ \text{PI} = 0.27 \] (with the Pearson's index rounded to two decimal places). 3. Since the value of \(\text{PI} = 0.27\) is very close to zero, it indicates that the distribution is nearly symmetric. Therefore, it can be concluded that the distribution is not significantly skewed. Thus, the calculation confirms that the distribution is not significantly skewed.

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The Deep Dive

Pearson's index of skewness is a handy statistic for understanding the symmetry of a dataset. It’s calculated by using the formula \( \mathrm{PI} = \frac{3(\text{Mean} - \text{Median})}{\text{Standard Deviation}} \). When the computed value is close to zero, it indicates that the data is approximately symmetric. In this case, with a skewness index of \( 0.27 \), it confirms that the distribution leans slightly toward the right but does not suggest significant skewness. Real-world applications of skewness can be found in finance, where understanding the distribution of asset returns is critical. A distribution that is skewed to the right might indicate the potential for higher returns, but with increased risk. Investors often use skewness to gauge risk and shape their investment strategies, aiming for a balance that meets their financial goals while considering the underlying risks associated with asymmetric returns.

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