How to Calculate a 95% Confidence Interval
Not what you're looking for?
A random sample of 20 patients in a weight loss clinical trial lost an average of 25 pounds over an 8 week period. The sample standard deviation is 10. What is the 95% confidence interval for the weight loss for all patients included in the weight loss clinical trial?
Purchase this Solution
Solution Summary
A complete, worked through solution outlining the steps needed to calculate a 95% confidence interval for a specific statistics example.
Solution Preview
In order to find the 95% confidence interval for this question, we will use the following formula:
confidence interval = mean +/- ...
Purchase this Solution
Free BrainMass Quizzes
Measures of Central Tendency
This quiz evaluates the students understanding of the measures of central tendency seen in statistics. This quiz is specifically designed to incorporate the measures of central tendency as they relate to psychological research.
Know Your Statistical Concepts
Each question is a choice-summary multiple choice question that presents you with a statistical concept and then 4 numbered statements. You must decide which (if any) of the numbered statements is/are true as they relate to the statistical concept.
Terms and Definitions for Statistics
This quiz covers basic terms and definitions of statistics.
Measures of Central Tendency
Tests knowledge of the three main measures of central tendency, including some simple calculation questions.