A manufacturer wants to increase the absorption capacity of a sponge. Based on past data the average sponge could absorb 103.5ml.After the redesign the absorption amounts of a smaple of sponges were (in millimetres): 121.3,109.2,103.5112.4,115.3,106.5,112.4,118.3 and 115.3. 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 a)reject the null hypotheses if completed t is less than 2.74 b)do not reject the null hypotheses if computed t is less than 2.821 c)reject null hypotheses if computed z is 1.96 or larger d)none of the above  e)do not reject null hypothesis if computed tis less than 2.580

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2-Proportion Test

In a 2-proportion test, two separate proportions are measured at the same time, and their similarity is evaluated. It is also known as a 2-proportion z-test, and a comparison of two different proportions is done in this method.