Description
The Module 04 Homework assignment covers Chapter 9; Inferences from Two Samples. This chapter provides you with important concepts for testing a hypothesis about a population mean, population proportion, and population standard deviation/variance for two samples.
For the Module 04 Homework, please download the Microsoft Word document using the link below and follow the directions included in the assignment.
Explanation & Answer
The solution is attached.Please, give me feedback.
Name:______________________________________
Module 4 Homework Assignment
1. Determine whether the samples are independent or dependent.
The effectiveness of a new headache medicine is tested by measuring the amount of time before the
headache is cured for patients who use the medicine and another group of patients who use a placebo
drug. Explain.
Solution:
The samples are independent.
Instructor Comments:
2. Determine whether the samples are independent or dependent.
The effectiveness of a headache medicine is tested by measuring the intensity of a headache in patients
before and after drug treatment. The data consist of before and after intensities for each patient.
Explain.
Solution:
The samples are dependent.
Instructor Comments:
3. In a random sample of 500 people aged 20-24, 22% were smokers. In a random sample of 450 people
aged 25-29, 14% were smokers. Test the claim that the proportion of smokers in the two age groups is
the same. Use a significance level of 0.01. Show all steps of the hypothesis test and all calculations.
Solution:
𝑝̂1 = 0...