In which situation would the research and the null hypothesis be ...

[mckennatimberlake]

In which situation would the research and the null hypothesis be the same?
 
  a. Researcher does not think that the research is going to mean anything.
  b. Researcher predicts that there will be no difference among the groups.
  c. Statistical analysis reveals a correlation coefficient of zero.
  d. Study has serious flaws and is declared null and void.

Question 2

A researcher uses the following hypothesis in a study: Excessive listening to alternative music will lead to increased depression in young teenagers.
 
  Which of the following dependent variables would need to be defined operationally in the research study?
  a. Alternative music
  b. Depression
  c. Excessive listening
  d. Young teenagers

[abctaiwan]

Answer to Question 1

ANS: B
The null hypothesis is the statistical hypothesis that tests for no relationship. It is also used when the researcher predicts that there is no relationship between the variables.
If the researcher does not think the research is going to mean anything, it is probably best not to conduct it. The null hypothesis is the statistical hypothesis that tests for no relationship. It is also used when the researcher predicts that there is no relationship between the variables.
The correlation coefficient may be found to be zero; however, the researcher's hypothesis may have been other than that. The null hypothesis is the statistical hypothesis that tests for no relationship. It is also used when the researcher predicts that there is no relationship between the variables.
There is no connection between finding serious flaws in a study and the research and null hypotheses. The null hypothesis is the statistical hypothesis that tests for no relationship. It is also used when the researcher predicts that there is no relationship between the variables.

Answer to Question 2

ANS: B
An operational definition is developed so that variables and other terms in a study can be measured or manipulated and so that readers can understand all parts of the study and will be able to replicate the study as closely as possible if desired. Although all of the listed variables and terms require an operational definition to provide a common and measurable understanding of the concepts, depression is the only dependent variable in the study as described.
Alternative music is not the dependent variable in this study. However, it does need to be defined as so to provide a clear understanding of this particular genre of music to the reader of the study.
Excessive listening is the independent variable in this study. It needs to be defined to provide a clear understanding of how the term excessive will be measured.
Young teenagers are the target population under study. A clear definition is required to provide a boundary for who is to be included in the study.

[mckennatimberlake]

TYSM

[daiying98]

Gracias!