Answered: A study by a reputable research group…

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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Question

A study by a reputable research group captured multitasking activities of adults who use different devices while watching TV. The study reported that 320 of 442 (72%) smartphone users sampled, 192 of 350 (55%) computer users sampled, and 139 of 260 (53%)
tablet users sampled used their device to check social media unrelated to the video content while watching TV. Complete parts (a) through (c) below.

a. Is there evidence of a significant difference among the smartphone, computer, and tablet users with respect to the proportion who use their device to check social media unrelated to the video content while watching TV? (Use α=0.10.)

Your answer is correct.

The test statistic is

χ2STAT=35.860

The critical value for α=0.10

Please help and explain how to achieve critical value

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