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A sample of 423 German citizens shows that they spend on average 43.54 dollars on chocolate every month with a variance of 8.77 dollars. A

A sample of 423 German citizens shows that they spend on average 43.54 dollars on chocolate every month with a variance of 8.77 dollars. A sample of 345 Americans shows they spend on average 35.67 dollars on chocolate every month with a variance of 6.97 dollars. Calculate the estimated effect size.

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