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In a survey of men aged 20-29 in a country, the mean height was 73.4 inches with a standard deviation of 2.7 inches. Find the height of the shortest man in the top 10%.

Options:
a. 75.7 inches
b. 71.5 inches
c. 70.8 inches
d. 74.1 inches

User Hymir
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1 Answer

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Final answer:

To find the height of the shortest man in the top 10%, we need to determine the z-score that corresponds to the top 10% of the distribution. Using the z-score formula and the given mean and standard deviation, we can calculate the height of the shortest man to be approximately 76.1 inches.

Step-by-step explanation:

To find the height of the shortest man in the top 10%, we need to determine the z-score that corresponds to the top 10% of the distribution. The formula for the z-score is:

z = (X - μ) / σ

where X is the given height, μ is the mean height, and σ is the standard deviation. Rearranging the formula to solve for X, we have:

X = μ + z * σ

Since we want the height of the shortest man, we need to find the z-score that corresponds to the top 10% of the distribution. Using a z-table or a calculator, we find that the z-score for the top 10% is approximately 1.28. Plugging this value into the formula, we get:

X = 73.4 + 1.28 * 2.7 = 76.076 inches

Therefore, the height of the shortest man in the top 10% is approximately 76.1 inches.

User Antoine Xevlabs
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