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3 October, 20:01

The mean and the standard deviation of the sampled population are 225.8and 17.8 respectively. What is the mean and standard deviation of the sample mean when n = 25?

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  1. 3 October, 21:56
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    Mean and standard deviation of the sample mean are 225.8 and 3.56 respectively.

    Step-by-step explanation:

    The mean (μₓ) and standard deviation of the sample mean (σₓ) are related to the mean (μ) and standard deviation of the population (σ) through the following relationship

    μₓ = μ = 225.8

    σₓ = σ/√n = 17.8/√25 = 17.8/5 = 3.56
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