MATH225
Week 7 Lab Assignment
Name: Instructor Name:
Please use this template to help answer the questions listed in the lab
instructions. The “steps” below refer to the steps listed in the lab
instructions. Type your answers and post your screenshots in the
spaces given.
Summary of Articles
Write a few complete sentences summarizing what you learned from the
articles provided.
A. Summary of Article #1
The first article, "Confidence Intervals: Part 1," introduces
confidence intervals as a method for estimating values in a whole
group by studying a small sample. A confidence interval gives a
range where the true average or proportion for the whole group
is likely to be. For example, a 95% confidence interval means
that if the process were repeated many times, 95% of the results
would include the true value. The article notes that a narrower
range yields a more accurate estimate. A wider range indicates
greater uncertainty and may require additional data.
B. Summary of Article #2
The second article, Confidence Intervals: Part 2, explains how to
use these ranges to compare two groups. If the ranges for two
group averages overlap, the difference is not considered
important. If they do not overlap, the difference is considered
important. The article also notes that researchers may examine
the range of the difference directly. If this range does not include
zero, the difference matters. For example, comparing the
average blood pressure between active and inactive patients
reveals how overlapping or non-overlapping ranges can alter the
conclusion.
