The mean time to assemble a piece of furniture is 52 minutes. Suppose the the assembly...

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The mean time to assemble a piece of furniture is 52 minutes. Suppose the the assembly...

The mean time to assemble a piece of furniture is 52 minutes. Suppose the the assembly times are normally distributed with a standard deviation of 4.3 minutes. What percentage of assembly times fall between 47.7 minutes and 56.3 minutes?

Use the Empirical Rule

	16%
	68%
	99.7%
	95%

math Statistics-And-Probability

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Answer 1

Answer #1

Let μ =52 and σ= 4.3 Here μ-σ=52-4.3 = 47.7 and μ + σ = 52 + 4.3=56.3 The required probability is p(47.7srs 56.3) ~ 68%, by e

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