Asked by Tiffany Sherrill on May 22, 2024
Verified
If a researcher decreases the confidence level from 99% to 90%, the confidence interval for the mean is ______.
A) widened
B) unchanged
C) narrowed
D) restricted
Confidence Level
The probability that the values of a parameter lie within a specified range of values, indicating the reliability of an estimate.
Mean
The arithmetic average of a set of numbers, calculated by adding them together and dividing by the number of values in the set.
- Gain insight into how levels of confidence correlate with the scale of interval widths.
- Comprehend the impact of changing confidence levels on confidence interval precision.
Verified Answer
BB
Birva BarotMay 24, 2024
Final Answer :
C
Explanation :
Decreasing the confidence level from 99% to 90% results in a narrower confidence interval because less certainty (or confidence) about the estimate allows for a smaller range of values.
Learning Objectives
- Gain insight into how levels of confidence correlate with the scale of interval widths.
- Comprehend the impact of changing confidence levels on confidence interval precision.