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Mathematics, 09.12.2020 20:50 tanaemichel

A small electronics store has begun to advertise in the local newspaper. They claim that their sales are now greater than last year's, $9820. A
random sample of 10 weeks while the ads were running had a sample
mean of $10960 and the population standard deviation was $1580. Test
the claim at the .05 level of significance.

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