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A researcher hypothesizes that people who listen to classical music have higher concentration skills than those in the general population. On a standard concentration test, the overall mean is 15.5. The researcher gave this same test to a random sample of 12 individuals who regularly listen to classical music. Their scores on the test were as follows: 16, 14, 20, 12, 25, 22, 23, 19, 17, 17, 21, 20
1) Is this a one- or two-tailed test?
2) Conduct all 6 steps of the appropriate statistic. Be sure to label all six steps.
3) Calculate and interpret the effect size for this test.
A bar chart to illustrate the differences. What type of statistics was shown? What activities did the newspaper use to make the report?
Describe the unique fundamentals of a qualtitative research study, addressing the following:
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to test whether the true average percentage is 5.5 for a particular production facility 16 independently obtained
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An electrical firm manufactures light bulbs that have a length of life that is approximately normally distributed. If a sample of 16 bulbs has an average life of 50 hours and the population standard deviation is known to be 10 hours.
Can the formal hypothesis testing approach be used for nonparametric tests? How are parametric and nonparametric statistics different?
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