A hotdog vendor who operates just outside the front door of a major hardware store wants to know if his daily sales have increased this summer, compared with last summer. He does not have electronic records, so he selects a random sample of days from last summer, and calculates daily sales from his records. He does the same for a random sample of days from this summer. Is there sufficient evidence for the owner to conclude that daily sales are higher than last year, on average? Use α = 0.03
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