By how many times does the sample size have to be increased to decrease the margin of error by a factor of - The sample size must be increased by a factor of to decrease the margin of error by a factor of 2 (Type a whole number.) What is the general relationship, if any, between the sample size and the margin of error? O A. Increasing the sample size by a factor M results in the margin of error decreasing by a factor of M O B. Increasing the sample size by a factor M results in the margin of error decreasing by a factor of M OC. 1 Increasing the sample size by a factor M results in the margin of error decreasing by a factor of VM O D. There is no relationship between the sample size and the margin of error