(ii) Test whether the two populations share the same proportions of preferences for each type of communication method. Use α = 0.05.(a) What is the level of significance? (b) Find the value of the chi-square statistic for the sample. (Round the expected frequencies to at least three decimal places. Round the test statistic to three decimal places.) What are the degrees of freedom? Random samples of people ages 15-24 and of people ages 25-34 were asked about their preferred method of (remote) communication with friends. The respondents wereasked to select one of the methods from the following list: cell phone, instant message, e-mail, other.Preferred Communication MethodInstant MessageRow TotalAgeCell PhoneEmailOther15-2448406.10025-3439291616100Column Total87692222200

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Answered: Random samples of people ages 15-24 and…

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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(ii) Test whether the two populations share the same proportions of preferences for each type of communication method. Use α = 0.05.

(a) What is the level of significance?

(b) Find the value of the chi-square statistic for the sample. (Round the expected frequencies to at least three decimal places. Round the test statistic to three decimal places.)

What are the degrees of freedom?

Random samples of people ages 15-24 and of people ages 25-34 were asked about their preferred method of (remote) communication with friends. The respondents were
asked to select one of the methods from the following list: cell phone, instant message, e-mail, other.
Preferred Communication Method
Instant Message
Row Total
Age
Cell Phone
Email
Other
15-24
48
40
6.
100
25-34
39
29
16
16
100
Column Total
87
69
22
22
200

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