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If x represents a random variable with mean 147 and standard deviation 45, then the standard...

If x represents a random variable with mean 147 and standard deviation 45, then the standard deviation of the sampling distribution of the means with sample size 81 is 5.

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Answer #1

Solution :

Given that,

mean = = 147

standard deviation = = 45

n = 81

= 147

= / n = 45 / 81 = 5

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