A manufacturer wants to increase the absorption capacity of a sponge. Based on p
ID: 3390783 • Letter: A
Question
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): 4.1, 3.7, 3.3, 3.5, 3.8, 3.9, 3.6, 3.8, 4.0, and 3.9. 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?
Do not reject null hypothesis if computed t is less than 2.580
Do not reject null hypothesis if computed t is less than 2.821
Reject null hypothesis if computed z is 1.96 or larger
Reject null hypothesis if computed t is less than 2.764
Do not reject null hypothesis if computed t is less than 2.580
Do not reject null hypothesis if computed t is less than 2.821
Reject null hypothesis if computed z is 1.96 or larger
Reject null hypothesis if computed t is less than 2.764
Explanation / Answer
A manufacturer wants to increase the absorption capacity of a sponge. Based on p
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