The article referenced says that when women aged 25-34 binge drink they have on average 6.7 drinks. I'm wondering if women in Laramie are different than the national average. Assume the standard deviation is 0.21 drinks. I sample 19 women who have done binge drinking, and their average is 5.1 drinks. Can I say at the 0.05 significance level that the average is not equal to 6.7?

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