random sample of 60 children from low income families and found that these

# Random sample of 60 children from low income families

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random sample of 60 children from low-income families and found that these children were exposed to a sample mean of 4.5 hours of daily background television. A. Develop hypothesis that can be used to test your research hypothesis. B. Based on a previous study, you are willing to assume that the population standard deviation is σ = 1.5 hours. What is the p-value based on your sample of 60 children from low-income families? C. Use α =0.01 as the level of significance. What is your conclusion ? 4.) An extensive study of the cost of health care in the United States presented data showing that the mean spending per Medicare enrollee in 2003 was \$6883. To investigate differences across the country, a researcher took a sample of 40 Medicare enrollees in Indianapolis. For the Indianapolis sample, the mean 2003 Medicare spending was \$5980 and the standard deviation was \$2518. A. State the hypotheses that should be used if we would like to determine whether the mean annual Medicare spending in Indianapolis is lower than the national mean. B. Use the preceding sample results to compute the test statistic and the p-value. C. Use α =0.05. What is your conclusion? D. Repeat the hypothesis test using the critical value approach.

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