2.You meet four residents of a faraway island with heights 146cm, 151cm, 154cm, and 179cm respectively. Assuming the standarddeviation for the heights of all people is 4cm, what is the probability that the average height of all residents of this island is at most158cm?3. Your colleague Chenique was required to collect a sample size of at least 123 Chilean otters for a study about the average tail length ofChilean otters. The margin of error must be 0.2cm or less. If the standard deviation of the length of all Chilean otters' tails is 1.7cm, whatwas the level of confidence (in percent)?

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A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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2. You meet four residents of a faraway island with heights 146cm, 151cm, 154cm, and 179cm respectively. Assuming the standard deviation for the heights of all people is 4cm, what is the probability that the average height of all residents of this island is at most 158cm?