Verified Document

SPSS Statistics: Correlation & Regression Data Analysis Chapter

2. What is the population of interest? What is the sample?

All shifts at the plant in question make up the population of interest.

160 randomly selected shifts make up the sample.

3. On the basis of the output, what can you conclude about the null hypothesis?

The null hypothesis can be rejected. There is a significant linear regression between volume and defect rate and the slope is not equal to 0.

4. Can you reject the null hypothesis that the slope is 0?

Yes. The scatter plot shows a linear relationship and the regression coefficient is .740. The value of t is 13.846, indicating that the slope is 13.846 standard error units above a slope of 0, which has a significance of .000, therefore allowing one to reject the hypothesis that the slope is equal to 0.

5. Can you reject the null hypothesis that there is no linear relationship between the dependent and independent variables?

Yes. There is a relationship between the dependent and independent variables, as evidenced by the significant regression analysis and the significant correlation coefficient.

6. Can you reject the null hypothesis that the population correlation coefficient is 0?

Yes, when we reject the null hypothesis that the slope is equal to 0, this allows us to also reject the null hypothesis that the population correlation coefficient is equal to 0.

7. What would you predict the defect rate to be on a day when the volume is 4200...

In what way do the two estimates of the defect rate in the question above differ?
The predicted values are the same, but the variability would be different.

Question 11E

1a.

Father's education = .760(mother's education) + 2.572

1b.

Yes, the null hypothesis can be rejected. There is a linear relationship between father's and mother's education.

1c.

40.8% of the variability in father's education can be explained by mother's education.

1d.

If the slope value is positive, we know that as the value of one variable increases the value of the other variable also increases (by the value of the slope). Thus, if the slope is positive, we can tell that the correlation coefficient will also be positive.

1e.

Although we can tell that the relationship between the two variables will be positive based on the slope being positive, we cannot determine the strength of the correlation based on the slope. Because we have concluded that the slope is significantly different from 0, we can also reject the null hypothesis that the population correlation coefficient is 0.

2a. Father's education…

Sources used in this document:
References

Norusis, M.J. (2008). Guide to Data Analysis. SPSS Statistics 17.0.
Cite this Document:
Copy Bibliography Citation

Related Documents

SPSS Data Analysis Does the Number of
Words: 827 Length: 3 Document Type: Research Paper

SPSS Data Analysis Does the number of average study hours per week during the semester accurately predict final exam grades? Independent variable: average number of study hours per week. Hours is continuous data because it can take on any value below 168 hours, which is the number of hours in a week. Even though the data is reported in integer form the 'hours' data is continuous. Hours data is quantitative, since it can be

SPSS Study Description: List the Research Question
Words: 1261 Length: 3 Document Type: Research Paper

SPSS Study Description: List the research question for the study. The researcher is interested in looking at whether or not an appraisal from a person's manager regarding their job performance affects the person's self-esteem as measures on a self-esteem appraisal survey (SEM). According to the vignette while the researcher has managers give either a positive rating or a negative rating; he/she has no pre-experimental hypotheses regarding of how these specific appraisals will

Statistics
Words: 1450 Length: 5 Document Type: Term Paper

Statistics and Their Importance to Research Investigation. Although all research activities do not require the use of statistical data analysis when an investigator wants to report upon the differences, effects and/or relationships between and amongst groups or phenomena (i.e. variables) there must a concerted effort to measure the phenomenon with as much precision and accuracy as possible (Mendenhall & Ramey, 1973). This is, of course, accomplished through the use of

Statistics
Words: 3900 Length: 15 Document Type: Term Paper

A level of quality assurance should be indicated within the confines of any study or related matter provided in literature used to inform, mimic, or develop in the means of school counseling. Retrospective Studies = Research conducted by reviewing records or information about past events elicited through interviews with persons who have, and controls who do not have, a disease under investigation (UP, 2002). This term may apply to the

Correlation and Causation Understanding Correlation
Words: 1147 Length: 3 Document Type: Essay

Then values of x are plotted with the corresponding values of y. If the relationship between the variables is positive then a line drawn through the points will slope upward. This upward slope signifies that as the values for x increase the values corresponding values for y also increase. The opposite will be true for a negative relationship. In this case the line will slope downward and the correlation

Correlations Three Correlations Correlations: From Marijuana Use
Words: 734 Length: 2 Document Type: Essay

Correlations Three correlations Correlations: From marijuana use to meat eating to fast food One of the most commonly-cited statistics in the popular media is the strong correlation between marijuana use and later 'hard' drug use, although it is uncertain if marijuana is causally related, or merely correlated with this phenomenon. Another surprising correlation in the use of marijuana also perplexes researchers. There also appears to be a strong correlation between schizophrenia and heavy

Sign Up for Unlimited Study Help

Our semester plans gives you unlimited, unrestricted access to our entire library of resources —writing tools, guides, example essays, tutorials, class notes, and more.

Get Started Now