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By how many times does the sample size have to be increased to decrease the margin of error by 2 times?(1 point)
The sample size has to be increased
times.
4 times.
To decrease the margin of error by 2 times, you need to increase the sample size by a factor of 4. This is because the margin of error is inversely proportional to the square root of the sample size. So, to decrease the margin of error by 2 times, you need to increase the sample size by a factor of 2 squared, which is 4.