Mathew determines that the “power” for detecting a posttest score of the size Mathew expects with his experiment is .9999. Explain what this

A researcher predicted that students will learn better if they attribute their performance to effort rather than natural ability. In one condition, a randomly selected group of sixth graders wrote an essay about a time when they worked hard to reach a goal. In a second condition, a different randomly selected group of sixth graders wrote about a skill they thought they were naturally good at. Afterwards, the students began a nine-week social studies unit that concluded with an achievement test. Use the data below to conduct an 1. appropriate statistical test (higher scores indicate higher achievement). Follow the 7 hypothesis testing steps you have been taught. Some of the steps have already been done for you. Wrote about Wrote about effort natural ability 81.89 M 84.77 40 55 60 60 1. Ho: There is no difference in the achievement scores of the students who wrote about effort and those who wrote about natural ability Mefort = Hability Ha: There is a difference in the achievement scores…

Compute the value of the test statistic and conclude.

A researcher is looking at a new marketing campaign for a product. After 200 people watched the marketing campaign about 60 percent liked the product. Prior to the marketing campaign the product was liked by about 50 percent of people.  What are the chi-square test degrees of freedom for this research description?