Enter your answers in the spaces below. Enlarge the spaces if necessary.
1. A researcher explores the relationship between self-control (as a self-reported trait) and impulsive buying among 30 unemployed adults between the ages of 25 and 40. Scores on the self-control scale can range from 20 to 100, with higher scores suggesting more of the trait. Impulsive buying was assessed with 5 items, and scores can range from 5 to 25, with higher scores reflecting more impulsive buying behavior.
The researcher computes the correlation between the variables to be −.46.
1a. [8%] State a null hypothesis.
1b. [8%] State a directional (1-tailed) alternative hypothesis.
1c1. [8%] Can you reject the null hypothesis?
1c2. [8%] Why or why not?
1d. [8%] What is the probability of a Type I error?
1e. [2.6%] What is the probability of a Type II error?
The researcher computes the linear regression predicting impulsive buying from self-control and finds this prediction equation: Y ′ = −.25X + 20.
1f. [8%] If an adult scores 72 on self-control, what is their predicted impulsive buying score?
1g1. [2%] Given the information you have, can you predict a person’s self-control scores from his impulsive buying score?
1g2. [2%] Why or why not?
1h. [6.4%] What percentage of the variability in impulsive buying is accounted for by knowing its relationship with self-control?
2. In last week’s assignment you worked with (fictional) data showing that, for students, creativity is negatively correlated with honesty (r = -.565, p(2-tailed) = .028). Now we consider whether these variables are related to students’ academic performance. The table at the end of this problem contains last week’s data, with a column added for Academic Standing, which is coded as follows:
1 = in good academic standing and
0 = on academic probation.
2a. [7%] What is the measurement scale (nominal, ordinal, or interval/ratio) for the Academic Standing variable? (Note: Honesty and Creativity are on an interval/ratio scale.)
2b. [8%] Compute the appropriate correlation and statistical test to determine whether Academic Standing is related to Creativity.
2c. [8%] Compute the appropriate correlation and statistical test to determine whether Academic Standing is related to Honesty.
2d. [8%] Describe both of these results using APA format, being sure to state whether each is statistically significant.
2e. [8%] Using APA format, discuss the meaning and implications of your findings.
Our Advantages
Plagiarism Free Papers
All our papers are original and written from scratch. We will email you a plagiarism report alongside your completed paper once done.
Free Revisions
All papers are submitted ahead of time. We do this to allow you time to point out any area you would need revision on, and help you for free.
Title-page
A title page preceeds all your paper content. Here, you put all your personal information and this we give out for free.
Bibliography
Without a reference/bibliography page, any academic paper is incomplete and doesnt qualify for grading. We also offer this for free.
Originality & Security
At Homework Sharks, we take confidentiality seriously and all your personal information is stored safely and do not share it with third parties for any reasons whatsoever. Our work is original and we send plagiarism reports alongside every paper.
24/7 Customer Support
Our agents are online 24/7. Feel free to contact us through email or talk to our live agents.
Try it now!
How it works?
Follow these simple steps to get your paper done
Place your order
Fill in the order form and provide all details of your assignment.
Proceed with the payment
Choose the payment system that suits you most.
Receive the final file
Once your paper is ready, we will email it to you.
Our Services
We work around the clock to see best customer experience.
Pricing
Our prces are pocket friendly and you can do partial payments. When that is not enough, we have a free enquiry service.
Communication
Admission help & Client-Writer Contact
When you need to elaborate something further to your writer, we provide that button.
Deadlines
Paper Submission
We take deadlines seriously and our papers are submitted ahead of time. We are happy to assist you in case of any adjustments needed.
Reviews
Customer Feedback
Your feedback, good or bad is of great concern to us and we take it very seriously. We are, therefore, constantly adjusting our policies to ensure best customer/writer experience.