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Queiao4088
19.02.2021 •
Mathematics
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Answers on questions: Mathematics
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Ответ:
Ответ:
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Ответ:
Yes, we can conclude that more than 70% of the households in this city have high speed internet access
Step-by-step explanation:
given that in a sample of 150 households in a certain city, 110 had high-speed internet access.
Sample proportion =![\frac{110}{150} \\=0.7333](/tpl/images/0437/8538/1f081.png)
Hypothetical proportion is 0.70
Hence std error of p =![\sqrt{\frac{pq}{n} } \\=\sqrt{\frac{0.7*0.3}{150} } \\=0.03742](/tpl/images/0437/8538/36416.png)
(two tailed test at 5% level)
p difference = 0.0333
Test statistic Z = p diff/std error = 0.891
p value = 0.379
since p value is >0.05, we accept H0
Yes, we can conclude that more than 70% of the households in this city have high speed internet access