33. The following data gives the length of life of 200 persons.Age (in years):No. of Persons:0-910-1920-2930-3940-4950-5960-6970-79 80-896.15333945271810Calculate (i) Average age (ii) Standard deviation of the age of persons (iii) The percentage numberofagewhere length of life of a person falls within X±2o.

Answered: Image /qna-images/answer/946661be-31e9-4e46-b825-d9bd3a2d8267.jpg

Answered: 33. The following data gives the length…

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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Suppose that you wish to estimate the difference between mean pH measurements of rainfalls in two different locations, one in relatively unpolluted area and the other in an area subject to heavy air pollution. You want to be 95% confident that the margin of error for the difference between mean pH of rainfalls in relatively unpolluted area and mean pH of rainfalls in an area subject to heavy air pollution will not exceed 0.1 pH. How many rainfalls (pH measurements) must be included in each sample? Assume that the variance of pH measurements in a relatively unpolluted area is equal to 2 = 20, and the variance of pH measurements in an area subject to heavy pollution is equal to 2 = 0.25, and samples will be of equal size (n = n₂ = n). 2 It is supposed that values of pH in rainfalls are normally distributed in polluted and unpolluted areas. The number of rainfalls (pH measurements) that must be included in each sample is
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