Company A claims that 75% of their customers are very satisfied with the service they receive. To test the claim, a certain group of researchers surveyed 600 customers, using simple random sampling. Among the sampled customers, 430 say they are very satisfied. Assume that the sample is sufficiently large for the relevant test to be validly performed. Based on these findings, can we reject the Company A's hypothesis that 75% of the customers are very satisfied? Use a 0.05 level of significance.

MATLAB: An Introduction with Applications
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Author:Amos Gilat
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Chapter1: Starting With Matlab
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2022.04.22 21:46
2. Company A claims that 75% of their customers are very satisfied with the
service they receive. To test the claim, a certain group of researchers
surveyed 600 customers, using simple random sampling. Among the
sampled customers, 430 say they are very satisfied. Assume that the
sample is sufficiently large for the relevant test to be validly performed.
Based on these findings, can we reject the Company A's hypothesis that
75% of the customers are very satisfied? Use a 0.05 level of significance.
Transcribed Image Text:2022.04.22 21:46 2. Company A claims that 75% of their customers are very satisfied with the service they receive. To test the claim, a certain group of researchers surveyed 600 customers, using simple random sampling. Among the sampled customers, 430 say they are very satisfied. Assume that the sample is sufficiently large for the relevant test to be validly performed. Based on these findings, can we reject the Company A's hypothesis that 75% of the customers are very satisfied? Use a 0.05 level of significance.
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