Two years ago, a survey revealed that 9,3% of Americans are bilingual. In a recent sample...
Two years ago, a survey revealed that 9,3% of Americans are bilingual. In a recent sample of 880 American,66 are bilingual. A researcher would like to verify whether the percentage of a bilingual Americans is different from that of the survey of two years ago.
a) Formulate the null hypothesis and alternative hypothesis
b) Using a 10% confidential significance level, verify whether the null hypothesis is rejected.
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