Pregunta
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Which score indicates the highest relative Pusition? A score of \( 3 \cdot 2 \) on a test with mean 4.6 and Standard deviation 1.5 (b) A score of 32.630 on a test withe mean 800 . and standard deviation 200 (c) A score of 43 on the test with mean 50 and Standard deviation 5 .

Ask by Moran Wood. in Ghana
Feb 18,2025

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The score of 6 has the highest relative position.

Solución

To determine which score indicates the highest relative position, we can calculate the z-scores for each of the given scores. The z-score is calculated using the formula: \[ z = \frac{(X - \mu)}{\sigma} \] where: - \(X\) is the score, - \(\mu\) is the mean, - \(\sigma\) is the standard deviation. Let's calculate the z-scores for each of the three scores provided. ### (a) Score of \(3 \cdot 2\) on a test with mean 4.6 and standard deviation 1.5 1. Calculate \(X\): \[ X = 3 \cdot 2 = 6 \] 2. Calculate the z-score: \[ z_a = \frac{(6 - 4.6)}{1.5} \] ### (b) Score of 32.630 on a test with mean 800 and standard deviation 200 1. Calculate the z-score: \[ z_b = \frac{(32.630 - 800)}{200} \] ### (c) Score of 43 on a test with mean 50 and standard deviation 5 1. Calculate the z-score: \[ z_c = \frac{(43 - 50)}{5} \] Now, let's calculate these z-scores. Calculate the value by following steps: - step0: Calculate: \(\frac{\left(43-50\right)}{5}\) - step1: Remove the parentheses: \(\frac{43-50}{5}\) - step2: Subtract the numbers: \(\frac{-7}{5}\) - step3: Rewrite the fraction: \(-\frac{7}{5}\) Calculate or simplify the expression \( (6 - 4.6) / 1.5 \). Calculate the value by following steps: - step0: Calculate: \(\frac{\left(6-4.6\right)}{1.5}\) - step1: Remove the parentheses: \(\frac{6-4.6}{1.5}\) - step2: Subtract the numbers: \(\frac{1.4}{1.5}\) - step3: Convert the expressions: \(\frac{\frac{7}{5}}{\frac{3}{2}}\) - step4: Multiply by the reciprocal: \(\frac{7}{5}\times \frac{2}{3}\) - step5: Multiply the fractions: \(\frac{7\times 2}{5\times 3}\) - step6: Multiply: \(\frac{14}{15}\) Calculate or simplify the expression \( (32.630 - 800) / 200 \). Calculate the value by following steps: - step0: Calculate: \(\frac{\left(32.63-800\right)}{200}\) - step1: Remove the parentheses: \(\frac{32.63-800}{200}\) - step2: Subtract the numbers: \(\frac{-767.37}{200}\) - step3: Convert the expressions: \(\frac{-\frac{76737}{100}}{200}\) - step4: Multiply by the reciprocal: \(-\frac{76737}{100}\times \frac{1}{200}\) - step5: Multiply the fractions: \(-\frac{76737}{100\times 200}\) - step6: Multiply: \(-\frac{76737}{20000}\) Now that we have calculated the z-scores for each score, let's summarize the results: ### (a) Score of \(6\) \[ z_a = \frac{(6 - 4.6)}{1.5} = 0.9333 \quad (\text{approximately } 0.93) \] ### (b) Score of \(32.630\) \[ z_b = \frac{(32.630 - 800)}{200} = -3.83685 \quad (\text{approximately } -3.84) \] ### (c) Score of \(43\) \[ z_c = \frac{(43 - 50)}{5} = -1.4 \] ### Conclusion - \(z_a \approx 0.93\) - \(z_b \approx -3.84\) - \(z_c \approx -1.4\) The highest z-score is \(0.93\) from score (a). Therefore, the score of \(6\) indicates the highest relative position among the three scores.

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Bonus Knowledge

To determine which score indicates the highest relative position, we can calculate the z-scores for each of the provided test scores. For the first score, \( 3 \cdot 2 = 6 \): \[ z_1 = \frac{(6 - 4.6)}{1.5} = \frac{1.4}{1.5} \approx 0.93 \] For the second score, \( 32.630 \): \[ z_2 = \frac{(32.630 - 800)}{200} = \frac{-767.37}{200} \approx -3.84 \] For the third score, \( 43 \): \[ z_3 = \frac{(43 - 50)}{5} = \frac{-7}{5} = -1.4 \] So, comparing the z-scores, the highest relative position is indicated by a z-score of approximately \( 0.93 \) for the score of \( 6 \). In other words, the score of \( 6 \) is significantly above the average relative to its peers, making it the winner in this showdown! 📊✨

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