BQA 3123 Iva Ballard Exam 1 Questions and
Answers 100% Approved
Conditions needed for a valid large sample Confidence Interval -A random sample is
selected from the target population.
-The sample size is greater than or equal to 30
-Due to the CLT, this condition guarantees that the sampling distribution of X-bar is approx.
normal
Point Estimator a sample statistic used to estimate the corresponding population
parameter
Interval Estimator a formula that tells us how to use the sample data to calculate an
interval that estimates the target parameter
How to narrow a confidence interval -increase sample size
-lower confidence level
Answers 100% Approved
Conditions needed for a valid large sample Confidence Interval -A random sample is
selected from the target population.
-The sample size is greater than or equal to 30
-Due to the CLT, this condition guarantees that the sampling distribution of X-bar is approx.
normal
Point Estimator a sample statistic used to estimate the corresponding population
parameter
Interval Estimator a formula that tells us how to use the sample data to calculate an
interval that estimates the target parameter
How to narrow a confidence interval -increase sample size
-lower confidence level
