Marjory works at a commercial bakery. She is conducting an experiment to test the results of two yeast activators for making bread. The Rapid Prove activator claims to increase the rise of dough by at least 30%. The Quick Rise activator claims to increase the rise of dough by at least 26%. Marjory and her team bake 60 loaves of bread, 30 using the Rapid Prove activator and 30 using the Quick Rise activator.

After the loaves were baked, Marjory evaluated the rise of the breads as compared to previous doughs with no activator used. She reported that, on average, the rise of those made with the Rapid Prove activator increased by 25% and the rise of loaves made with the Quick Rise activator increased by 28%.

The Rapid Prove activator claim is __.
The Quick Rise activator claim is __.
The activator __ is more effective because the increase in rise was __ that of the other activator.

Acell phone company offers two plans to its subscribers. at the time new subscribers sign up, they are asked to provide some demographic information. the mean yearly income for a sample of 40 subscribers to plan a is $45,000 with a standard deviation of $9,200. for a sample of 25 subscribers to plan b, the mean income is $64,300 with a standard deviation of $7,100. at the 0.025 significance level, is it reasonable to conclude the mean income of those selecting plan b is larger? assume unequal population standard deviations. hint: for the calculations, assume the plan a as the first sample. what is the decision rule? (negative amount should be indicated by a minus sign. round your answer to 3 decimal places.) compute the value of the test statistic. (negative amount should be indicated by a minus sign. round your answer to 2 decimal places.) what is your decision regarding h0 ? reject h0 fail to reject h0 compute the p-value. less than 0.01 between 0.01 and 0.025 between 0.025 and 0.05 between 0.05 and 0.10 greater than 0.10