1) Amelia wants longer fingernails. She wants to do an experiment on herself that proves that taking a Vitamin B supplement daily will grow her fingernails faster than if she doesn't take any vitamin supplement. What would be a good null hypothesis here? a) Taking a Vitamin B supplement will increase fingernail growth. b) It is unknown if taking a Vitamin B supplement will increase or decrease fingernail growth.

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استعادة الحفظ التلقائي: ؟