A Researcher Wants to Study the Effects of Physical Exercise

question 59

Multiple Choice

A researcher wants to study the effects of physical exercise on depression.She randomly selects a group of 24 individuals who are equally depressed.None of these individuals currently exercises.She then randomly assigns them in one of three groups: group 1 stays without exercising (sedentary group) ,group 2 exercises once a week,and group 3 exercises two times a week.Individuals in groups 2 and 3 meet with a personal trainer so they carry out a very similar exercising program,both in kinds of exercises and in intensity.After two months,the researcher has all individuals take a depression-assessment test.The score of the test goes from 0 = totally miserable to 100 = complete satisfaction. The scores are shown in the following table:
The researcher uses a Kruskal-Wallis test and a significance level α = 0.05.The appropriate decision is ______.

• A) fail to reject the null hypothesis that the three groups have different levels of depression
• B) reject the null hypothesis that the three groups have different levels of depression
• C) fail to reject the null hypothesis that the three groups have equal levels of depression
• D) reject the null hypothesis that the three groups have equal levels of depression
• E) fail to reject the null hypothesis that the sample is random

Distinguish between different government types based on specific characteristics defined by political scientists.

Examine the impact of political knowledge and the internet on contemporary citizenship.

Understand how to efficiently update and manage content between Excel and Word.

Gain proficiency in customizing and editing charts in Word and Excel.

---

Definitions:

Freedom of Assembly

The right to gather peacefully with others in public or private spaces for expressive activities, protected by law in many democratic societies.

Individual Mandate

A requirement for individuals to have health insurance or face penalties, aimed at ensuring broader coverage and sharing of healthcare costs.

Affordable Care Act

Landmark health reform legislation passed in 2010 aimed at increasing health insurance quality and affordability, also known as Obamacare.

Taxing Clause

The taxing clause is a provision in a legal document or statute that grants a governing body the authority to impose taxes on individuals, corporations, or other entities.