A Consumer Products Company Wants to Increase the Absorption Capacity

question 1

Multiple Choice

A consumer products company 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. At the 0.01 level of significance,what is the decision rule to test if the new design increased the absorption of the sponge?

• A)Reject the null hypothesis if computed t is less than 2.580.
• B)Reject the null hypothesis if computed t is greater than 2.821.
• C)Reject the null hypothesis if computed z is 1.96 or larger.
• D)Reject the null hypothesis if computed t is less than 2.764.

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Definitions:

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