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What statistical procedure could be applied to determine whether these regional differences are statistically significant?

What statistical procedure could be applied to determine whether these regional differences are statistically significant?

MATLAB: An Introduction with Applications
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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人工知能を使用せず、 すべてを段階的にデジタル形式で解決してください。 ありがとう SOLVE STEP BY STEP IN DIGITAL FORMAT DON'T USE CHATGPT To study regional differences related to helpfulness toward strangers, a researcher dropped 400 keys (all of which had been marked and marked with a return address) around mailboxes in the northern, southern, eastern, and southern regions. west of a city. The number of keys returned per region (as an indicator of helpfulness) is indicated below: Application of statistical methods to research problems Returned Not returned North f 55 45 100 Region South f 69 31 100 East f 82 18 100 West f 61 39 100 What statistical procedure could be applied to determine whether these regional differences are statistically significant?
Transcribed Image Text:人工知能を使用せず、 すべてを段階的にデジタル形式で解決してください。 ありがとう SOLVE STEP BY STEP IN DIGITAL FORMAT DON'T USE CHATGPT To study regional differences related to helpfulness toward strangers, a researcher dropped 400 keys (all of which had been marked and marked with a return address) around mailboxes in the northern, southern, eastern, and southern regions. west of a city. The number of keys returned per region (as an indicator of helpfulness) is indicated below: Application of statistical methods to research problems Returned Not returned North f 55 45 100 Region South f 69 31 100 East f 82 18 100 West f 61 39 100 What statistical procedure could be applied to determine whether these regional differences are statistically significant?
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