A population of scores is normally distributed with a standard deviation equal to 7. State whether the

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A population of scores is normally distributed with a standard deviation equal to 7. State whether the standard error will increase, decrease, or remain unchanged if the value of the population standard deviation is changed to:
(a) σ = 10.
(b) σ = 2.
(c) σ = 28/4.
(d) σ = 4/20.
(e) σ = 7.5.
(f) σ = 0.
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