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Name: A recent survey of cell phone users indicated that 56 percent of the r
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Description: A recent survey of cell phone users indicated that 56 percent of the respondents prefer to use cell phones for texting rather than for making phone calls. A 95 percent confidence interval for the estimate of all cell phone users who prefer to use cel

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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A recent survey of cell phone users indicated that 56 percent of the respondents prefer to use cell phones for texting rather than for making phone calls. A 95 percent confidence interval for the estimate of all cell phone users who prefer to use cell phones for texting has a margin of error of 3 percent.

Assume all conditions for inference have been met. Based on the confidence interval, which of the following claims is supported?

Select A, B, C, or D

Less than half of all people prefer texting.

A
More than half of all people prefer texting.

B
At least 60 percent of all people prefer texting.

C
At least 75 percent of all people prefer texting.

D
At least 95 percent of all people prefer texting.

E

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