Question

A researcher is calculating a confidence interval. All other things being constant, what happens to the width of confidence interval when the confidence level is increased?

Decreases

Increases

May increase or decrease

Remain the same

Answer 1

A researcher is calculating a confidence interval. All other things being constant, what happens to the width of confidence interval when the confidence level is increased?

Answer : Increases

# Increasing the confidence level increases the error bound , Making the confidence interval wider , and

Decreasing the confidence level decreases the error bound , Making the confidence interval narrower .

Effect of following on width :

# The width of the confidence interval decreases as the sample size increases .

# The width increases as the standard deviation increases .

# The Width increases as the Confidence level increases .