By how many times does the sample size have to be increased to decrease the margin of error by 2 times?(1 point)
The formula to calculate margin of error is Margin of Error = Z * (σ / √n), where Z is the Z-score, σ is the standard deviation, and n is the sample size.
If we want to decrease the margin of error by 2 times, we need to increase the sample size by a factor that is the square of 2, which is 4.
Therefore, the sample size has to be increased by 4 times to decrease the margin of error by 2 times.