4. The mean age of De Anza College students in a previous term was 26.6 years old. An instructor thinks the mean age for online students is older than 26.6. She randomly surveys 60 online students and finds that the sample mean is 29.6 with a standard deviation of 2.1. Conduct a hypothesis test at the 5% level. a. In words, state what your random variable X represents. b. Sketch a picture of this situation. Label and scale the horizontal axis and shade the region(s) corresponding to the p-value. c. Construct a 95% confidence interval for the true mean. Sketch the graph of the situation. Label the point estimate and the lower and upper bounds of the confidence interval. (Round your answers to two decimal places.)

4. The mean age of De Anza College students in a previous term was 26.6 years old. An instructor thinks the mean age for online students is older than 26.6. She randomly surveys 60 online students and finds that the sample mean is 29.6 with a standard deviation of 2.1. Conduct a hypothesis test at the 5% level. a. In words, state what your random variable X represents. b. Sketch a picture of this situation. Label and scale the horizontal axis and shade the region(s) corresponding to the p-value. c. Construct a 95% confidence interval for the true mean. Sketch the graph of the situation. Label the point estimate and the lower and upper bounds of the confidence interval. (Round your answers to two decimal places.)

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Description: 4. The mean age of De Anza College students in a previous term was 26.6 years old. An instructor thinksthe mean age for online students is older than 26.6. She randomly surveys 60 online students and findsthat the sample mean is 29.6 with a standard

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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