A worker takes a random sample of 100 boxes and finds that


A company claims that the boxes of detergent that it sells contain more than the current 500 grams of detergent each. From past experience the company knows that the amount of detergent in the boxes is normally distributed with a standard deviation of 75 grams. A worker takes a random sample of 100 boxes and finds that the average amount of detergent in a box is 510 grams. Test the company's claim at the 0.05 level of significance.

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Basic Statistics: A worker takes a random sample of 100 boxes and finds that
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