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Ann [662]
4 years ago
10

Describe the sampling distribution of x-bar for samples of size 20 drawn from a normal population with a mean of 50 and standard

deviation of 4.
Mathematics
1 answer:
LUCKY_DIMON [66]4 years ago
3 0
If the original population has a Normal distribution, then the distribution of the sample mean is also Normal.
 If we extract random samples of size n from a population with half a μ and standard deviation σ, then the distribution of the sample mean will have the following parameters:
 μ_Xbar = μ
 σ_Xbar = σ/ √(n).

Where:
 μ = 50
 σ = 4
 n = 20
So:
 μ_Xbar = 50
 σ_Xbar = 0.8944
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Now consider another scenario, call it scenario B, where

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So
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Scenario B has completely different data than scenario A, yet the IQR and Range are equal to scenario A's counterparts. This shows that it is possible to have 2 completely sets of data yet have the same IQR and range. 

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