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IELTS score in móčk exan <4 5 2 5 15 8. 10 3 ented by this tutorial school 5 years ago indicated that the population mean score was 7.05 points andhe population proportion of students got 7 points or above act a 95% confidence interval estimate of population mean score a student get in t ation in 2022. 1% level of significance, if the population proportion of students get 7 points or a than that in year 2017. (The report must include the (i) null hypothesis and alterna ection region(s), (iii) calculation of test statistics, and (iv) conclusion.) confidence interval estimate in part (a) is constructed at 99% instead of 95%, would der, (II) narrower, or (III) no change in width? (State your answer, no explanatic c).) 649

IELTS score in móčk exan <4 5 2 5 15 8. 10 3 ented by this tutorial school 5 years ago indicated that the population mean score was 7.05 points andhe population proportion of students got 7 points or above act a 95% confidence interval estimate of population mean score a student get in t ation in 2022. 1% level of significance, if the population proportion of students get 7 points or a than that in year 2017. (The report must include the (i) null hypothesis and alterna ection region(s), (iii) calculation of test statistics, and (iv) conclusion.) confidence interval estimate in part (a) is constructed at 99% instead of 95%, would der, (II) narrower, or (III) no change in width? (State your answer, no explanatic c).) 649

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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Below is the summary A tutorial school has been running IELTS mock examination for many years. presented by the tutorial school related to the IELTS mock examination in one of the many online classes selected randomly in year 2022. IELTS score in mock examination Number of students <4 5 2 5 7 15 8 10 3 A report presented by this tutorial school 5 years ago indicated that the population mean score of IELTS mock examination was 7.05 points and ihe population proportion of students got 7 points or above was 0.67. (a) Construct a 95% confidence interval estimate of population mean score a student get in the IELTS mock examination in 2022. (b) Test, at 1% level of significance, if the population proportion of students get 7 points or above in 2022 is higher than that in year 2017. (The report must include the (i) null hypothesis and alternative hypothesis, (ii) rejection region(s), (iii) calculation of test statistics, and (iv) conclusion.) (c) If the confidence interval estimate in part (a) is constructed at 99% instead of 95%, would the interval be (State your answer, no explanation is needed in (I) wider, (II) narrower, or (III) no change in width? part (c).)
Transcribed Image Text:Below is the summary A tutorial school has been running IELTS mock examination for many years. presented by the tutorial school related to the IELTS mock examination in one of the many online classes selected randomly in year 2022. IELTS score in mock examination Number of students <4 5 2 5 7 15 8 10 3 A report presented by this tutorial school 5 years ago indicated that the population mean score of IELTS mock examination was 7.05 points and ihe population proportion of students got 7 points or above was 0.67. (a) Construct a 95% confidence interval estimate of population mean score a student get in the IELTS mock examination in 2022. (b) Test, at 1% level of significance, if the population proportion of students get 7 points or above in 2022 is higher than that in year 2017. (The report must include the (i) null hypothesis and alternative hypothesis, (ii) rejection region(s), (iii) calculation of test statistics, and (iv) conclusion.) (c) If the confidence interval estimate in part (a) is constructed at 99% instead of 95%, would the interval be (State your answer, no explanation is needed in (I) wider, (II) narrower, or (III) no change in width? part (c).)
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