Answered: Part A) Which of the following…

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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Part A)
Which of the following statements about confidence intervals is/are correct?

A confidence interval gives us information about the amount of random error present in our estimation of the population parameter.
A confidence interval gives us information about the amount of bias present in our estimation of the population parameter.

a) (I) only
b) (II) only
c) Both (I) and (II)
d) Neither (I) nor (II)

Part B)
A large-scale medical experiment enrolled 10000 male subjects and 10000 female subjects. Suppose the researchers were to randomly assign all 20000 subjects into two groups, X and Y, such that group X has 4000 subjects and group Y has 16000 subjects. Which of the following must be true?

The number of male subjects in group X is not equal to the number of male subjects in group Y.
The rate of male subjects in group X is exactly the same as the rate of male subjects in group Y.

a) (I) only
b) (II) only
c) Both (I) and (II)
d) Neither (I) nor (II)

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