Question

If the length of the ci is 10, what should be done to the sample size to reduce it to 5?

Answer 1

To reduce the length of the confidence interval (CI) from 10 to 5, you need to increase the sample size.

Step-by-step explanation:

To reduce the length of the confidence interval (CI) from 10 to 5, you would need to increase the sample size. The formula for the confidence interval is given by:

CI = 2 * (standard deviation / square root of sample size)

Since the standard deviation is not mentioned in the question, let's assume it remains the same. To reduce the CI to 5, you would need to double the sample size.