Resources: Course Assignments
Module 10 Assignment: Two Independent Samples
The purpose of this activity is to give you guided practice in obtaining and interpreting a 95% confidence interval for μ1 − μ2 following a two-sample T-test that rejected H0. Recall our second example:
![Our variable Age Group (X) has two categories: males 20–29 years old and males 75+ years old. These two groups form our two populations. For each population we have a separate μ, representing the weight (Y) mean of that population. For each population we take an SRS. From population 1 of males 20–29 years old, we obtain an SRS of size 712, and find that it has a mean of 83.4 and SD of 18.7. From population 2 of males 75+ years old, we take an SRS of size 1001 and find that it has a mean of 78.5 and SD of 19.0.](https://s3-us-west-2.amazonaws.com/courses-images/wp-content/uploads/sites/1729/2017/04/15032733/m10_inference_mean_topic_10_4_m10_est_diff_two_pop_means_1_image409.gif)
Instructions
Click on the link corresponding to your statistical package to see instructions for completing the activity, and then answer the questions below.
R | StatCrunch | Minitab | Excel | TI Calculator
Question:
Obtain the 95% confidence interval for μ1 – μ2 and interpret it in context.