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A manufacturer wants to increase the absorption capacity of a sponge. Based on past data, the average sponge could absorb 3.5 ounces. After the redesign, the absorption amounts of a sample of sponges were (in ounces): 3.6Picture 3.8Picture 4.1Picture 3.5Picture 4.0Picture 3.2Picture 3.7Picture 3.2Picture 3.1Picture and 3.4. What is the decision rule at the 0.01 level of significance to test if the new design increased the absorption amount of the sponge?

Reject null hypothesis if computed z is 1.248 or larger

Reject null hypothesis if computed t is less than 2.685

Do not reject null hypothesis if computed t is less than 2.821

Do not reject null hypothesis if computed t is less than 2.574

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Statistics and Probability, Statistics

Category:- Statistics and Probability
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