Question

question 10 (1 point)
increasing the confidence level while keeping the same sample size has what effect on the margin of error?
decreases the margin of error and hence decreases the precision
decreases the margin of error and hence increases the precision
increases the margin of error and hence decreases the precision
increases the margin of error and hence increases the precision

Explanation:

The margin of error formula is related to the critical - value which increases as the confidence level increases. With a fixed sample size, a higher confidence level means a larger critical - value, leading to a larger margin of error. A larger margin of error implies less precision.

Answer:

Increases the margin of error and hence decreases the precision