Hypothesis statements. Set up null and alternative hypotheses for each of these claims. Use two-sided alternative hypotheses in each instance. a) A counselor claims that a new method of conflict resolution is less prone to interruption than an old method. Prior experience suggests that clients interrupted each other an average of 10 times per session. Which hypotheses statements are appropriate? b) Americans gain an average of one pound per year as they age between the ages of 25 and 45. A public health campaign aims to decrease the amount of weight gained during this interval. (Note that we want to use two-sided alternative hypothesis.)

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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.