Q.2 Since lichen is a major source for Alaskan caribou, and caribou is major food source for the Alaskan villagers, it is important to monitor the level of radioactivity in lichen. Researcher at the University of Alaska, Fairbanks, collected 9 lichen specimens and measured the amount (in micro-curies per milliliter) of the radioactive element cesium-137 for each. Using the Minitab software we found that the mean and standard deviation for the 9 observations are x= 0.009027 and s = 0.004854 respectively. a. Give a point estimate for the mean amount of cesium in lichen specimens collected in Alaska. b. Give the t- value used in a small sample 95% confidence interval for the true mean amount of cesium in Alaskan lichen specimens. c. Form a 95% confidence interval for the true mean amount of cesium in Alaskan lichen specimens. d. Give a practical interpretation for the interval you obtained in part c. e. What assumptions are necessary for interval in part c to be valid? f. What would you do, if you want to decrease the width of the interval you found in part c?

Q.2 Since lichen is a major source for Alaskan caribou, and caribou is major food source for the Alaskan villagers, it is important to monitor the level of radioactivity in lichen. Researcher at the University of Alaska, Fairbanks, collected 9 lichen specimens and measured the amount (in micro-curies per milliliter) of the radioactive element cesium-137 for each. Using the Minitab software we found that the mean and standard deviation for the 9 observations are x= 0.009027 and s = 0.004854 respectively. a. Give a point estimate for the mean amount of cesium in lichen specimens collected in Alaska. b. Give the t- value used in a small sample 95% confidence interval for the true mean amount of cesium in Alaskan lichen specimens. c. Form a 95% confidence interval for the true mean amount of cesium in Alaskan lichen specimens. d. Give a practical interpretation for the interval you obtained in part c. e. What assumptions are necessary for interval in part c to be valid? f. What would you do, if you want to decrease the width of the interval you found in part c?

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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