Module 04 Homework

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Mathematics

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.

Module 04 Homework assignment

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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...


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