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Acertain type of thread is manufactured With a mean tensrle strength of 73.6 kilograms and a standard deviation 0M2 kilograms. How is the variance of

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Acertain type of thread is manufactured With a mean tensrle strength of 73.6 kilograms and a standard deviation 0M2 kilograms. How is the variance of the sample mean changed when the sample size is (a) increased from 4910 900? (b) decreased from 7841:) 36? (alThe sample variance : from V for n : 49 to V for n : 900 (Type integers or decimals, Do not round)

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