1. A researcher is interested in the world average growth rate. To study thus research question, a random sample of 7 countries is chosen and the growth rates for them is summarized in the table below: Country Growth rate (%) A 5 B 10 C 3 -6 E F 4 G -3 The researcher believe that growth rate of world are normally distributed with population variance of 2. The researcher believes that the world average growth rate is 2. Test the researcher hypothesis at 1% significance level against the two sided alternative using z-comparison approach. Clearly write null and alternative hypothesis for this question. b) Does your answer change if the significance level is changed to 10% significance level in part a)? Explain. c) Explain in words, how decreasing the significance level affects your hypothesis testing: Does 'rejecting the null hypothesis' scenario become less or more strict?

1. A researcher is interested in the world average growth rate. To study thus research question, a random sample of 7 countries is chosen and the growth rates for them is summarized in the table below: Country Growth rate (%) A 5 B 10 C 3 -6 E F 4 G -3 The researcher believe that growth rate of world are normally distributed with population variance of 2. The researcher believes that the world average growth rate is 2. Test the researcher hypothesis at 1% significance level against the two sided alternative using z-comparison approach. Clearly write null and alternative hypothesis for this question. b) Does your answer change if the significance level is changed to 10% significance level in part a)? Explain. c) Explain in words, how decreasing the significance level affects your hypothesis testing: Does 'rejecting the null hypothesis' scenario become less or more strict?

Holt Mcdougal Larson Pre-algebra: Student Edition 2012

1st Edition

ISBN:9780547587776

Author:HOLT MCDOUGAL

Publisher:HOLT MCDOUGAL

Chapter11: Data Analysis And Probability

Section: Chapter Questions

Problem 8CR

See similar textbooks