A recent poll of 700 people who work indoors found that 278 smoke. if the researchers want to be 98% confident of their results
to within 3.5 percentage points, how large a sample is necessary?
1 answer:
Answer:
We are given:

is the critical value at 0.02 significance level
is the margin of error
Therefore, the required sample size is:




Therefore, the required sample size n = 1061
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Step-by-step explanation: