glass
pen
clip
papers
heaphones

GRAND CANYON UNIVERSITY PSY 520 GRADUATE STATISTICS 2014

GRAND CANYON UNIVERSITY PSY 520 GRADUATE STATISTICS 2014

Module 5 Exercises

Grand Canyon University: PSY-520: Graduate Statistics 2014

Chapter 10:
3. Explain in your own words why it is important to know the possible errors we might make when rejecting or failing to reject the null hypothesis.
9. A primatologist believes that rhesus monkeys possess curiosity. She reasons that, if this is true, then they should prefer novel stimulation to repetitive stimulation. An experiment is conducted in which 12 rhesus monkeys are randomly selected from the university colony
and taught to press two bars. Pressing bar 1 always produces the same sound, whereas bar 2 produces a novel sound each time it is pressed. After learning to press the bars, the monkeys are tested for 15 minutes, during which they have free access to both bars. The number of presses on each bar during the 15 minutes is recorded. The resulting data are as follows:

Subject   Bar 1   Bar 2
1             20        40
2             18        25
3             24        38
4             14        27
5               5        31
6             26        21
7             15        32
8             29        38
9             15        25
10             9        18
11           25        32
12           31        28
a. What is the alternative hypothesis? In this case, assume a non-directional hypothesis is appropriate because there is insufficient empirical basis to warrant a directional hypothesis.
b. What is the null hypothesis?
c. Using α = 0.052 tail, what is your conclusion?
d. What error might you be making by your conclusion in part c?
e. To what population does your conclusion apply?

13. A researcher is interested in determining whether acupuncture affects pain tolerance. An experiment is performed in which 15 students are randomly chosen from a large pool of university undergraduate volunteers. Each subject serves in two conditions. In both conditions, each subject receives a short-duration electric shock to the pulp of a tooth. The shock intensity
is set to produce a moderate level of pain to the unanesthetized subject. After the shock is terminated, each subject rates the perceived level of pain on a scale of 0–10, with 10 being the highest level. In the experimental condition, each subject receives the appropriate acupuncture treatment prior to receiving the shock. The control condition is made as similar to the experimental condition as possible, except a placebo treatment is given instead of acupuncture. The two conditions are run on separate days at the same time of day. The pain ratings in the accompanying table are obtained.
a. What is the alternative hypothesis? Assume a non-directional hypothesis is appropriate.
b. What is the null hypothesis?
c. Using α = 0.052 tail, what is your conclusion?
d. What error might you be making by your conclusion in part c?
e. To what population does your conclusion apply?

Subject    Acupuncture    Placebo
1              4                      6
2              2                      5
3              1                      5
4              5                      3
5              3                      6
6              2                      4
7              3                      7
8              2                      6
9              1                      8
10            4                      3
11            3                      7
12            4                      8
13            5                      3
14            2                      5

Chapter 12:
3. How are sampling distributions generated using the empirical sampling approach?
5. What are the assumptions underlying the use of the z test?
8. How do each of the following differ?
a. s and s
b. s² and σ²
c. µ and µ
d. σ and σ

16. How does increasing the N of an experiment affect the following?
a. Power
b. Beta
c. Alpha
d. Size of real effect

20. A set of sample scores from an experiment has an N = 30 and an  obt  = 19.
a. Can we reject the null hypothesis that the sample is a random sample from a normal population with µ = 22 and σ = 8? Use α = 0.011 tail. Assume the sample mean is in the correct direction.
b. What is the power of the experiment to detect a real effect such that µreal = 20?
c. What is the power to detect a µreal = 20 if N is increased to 100?
d. What value does N have to equal to achieve a power of 0.8000 to detect a µreal = 20? Use the nearest table value for zobt.

21. On the basis of her newly developed technique, a student believes she can reduce the amount of time schizophrenics spend in an institution. As director of training at a nearby institution, you agree to let her try her method on 20 schizophrenics, randomly sampled from your institution. The mean duration that schizophrenics stay at your institution is 85 weeks, with a standard deviation of 15 weeks. The scores are normally distributed. The results of the experiment
show that the patients treated by the student stay a mean duration of 78 weeks, with a standard deviation of 20 weeks.
a. What is the alternative hypothesis? In this case, assume a non-directional hypothesis is appropriate because there are insufficient theoretical and empirical bases to warrant a directional hypothesis.
b. What is the null hypothesis?
c. What do you conclude about the student’s technique? Use α = 0.052 tail.

25. A physical education professor believes that exercise can slow the aging process. For the past 10 years, he has been conducting an exercise class for 14 individuals who are currently 50 years old. Normally, as one ages, maximum oxygen consumption decreases. The national norm for maximum oxygen consumption in 50-year-old individuals is 30 milliliters per kilogram per minute, with a standard deviation of 8.6. The mean of the 14 individuals is 40 milliliters per kilogram per minute. What do you conclude? Use α = 0.051 tail.

References
Academic Web Services (n.d.). The Visual Learner – Statistics. Retrieved from: http://lc.gcumedia.com/hlt362v/the-visual-learner/the-visual-learner-v2.1.html.
Pagano, R. (2013). Understanding Statistics in the Behavioral Sciences (10th ed.). Wadsworth-Cengage Learning.

Order Solution Now

Click HERE to order a unique plagiarism free paper done by 

professional writers and delivered before your deadline

In the dynamic world we currently live in, it’s becoming increasingly difficult for students to balance academics, co-curricular activities and entertainment among others. Students are required to submit countless assignments in a short time frame. These assignments should not be taken lightly as they form a major part of the grade when it comes to the end of the semester. Understanding the value of education and how these grades are important to students, Infinite Essays has made it its mission in life to offer customized essays to students at an affordable cost.

Click HERE to order a unique plagiarism free paper done by 

professional writers and delivered before your deadline

There are plenty of reasons why you should order a paper with Infinite Essays. We have reliable writers who are also very competent. They have over the years managed to work under tight schedules and deadlines. Whenever you order an essay with Infinite Essays, you are guaranteed a fast turnaround of your project and this is done on time. Other than writing custom papers, our writers provide value added services that include academic assistance in the areas that they have specialized in. We ensure that the work that we offer is free of plagiarism. Infinite Essays does not condone plagiarism in whatsoever manner. Our writers are very experienced and can handle of sorts of formats such as Turabian, Chicago, Harvard as well as APA and MLA. Infinite Essays covers a wide range of topics. At the moment, we specialize with over 68 topics. We understand the importance of maintaining confidentiality when dealing with our clients. It’s for this reason that we will never reveal the identity of our clients to whoever may be interested. Finally, we offer the most competitive rates in the industry.

Click HERE to order a unique plagiarism free paper done by 

professional writers and delivered before your deadline

Whenever you want to make an order with us, you will use our automated online ordering system. If you are having some difficulties of any sort, feel free to contact our live support and they will be more than happy to assist you. Ensure that you fill all the relevant information regarding your order. This is the area where you have to include the deadline of your assignment, the formatting style to be used and even the kind of academic paper you desire. The more information you give to our writers, the better.

Click HERE to order a unique plagiarism free paper done by 

professional writers and delivered before your deadline

Brief explanations of how our services work 1. Provide us with the necessary instructions. Go to the Order Now page and click the order now button. This is the part where you have to attach all the relevant attachments. At the same time, remember to add the instructions sheet here. Once you are sure that you have submitted all relevant information, please submit the final draft to us. 2. The second step will involve paying for the services. This is where an invoice will be sent to you. However, the easiest process is clicking the payment link and following all the prompts that come along. At the moment, all payments are made through PayPal only. 3. Working on your paper. Once you have made the payment, we will assign the order to a writer who will follow the instructions. Remember that our writers will spend countless hour laboring to ensure that the work they provide is meticulously researched. 4. Download your paper. When the writer is finished with the assignment, they will submit it to our writers who will then go through the paper to ensure that the paper has followed all instructions and there are no grammatical errors. We will then forward a copy of the assignment to your email. 5. Tell your friends. We always happy to receive a referral. Whenever a friend tells us that you recommended our services to them, we will give you a 40 percent discount for your next order. Whenever you have provided us with the necessary details, we will forward them to qualified writers who will handle the assignment for you. Remember that the writers will begin working on the assignment immediately. This is the sole reason we encourage our clients to provide their exact specifications during the first time.

Click HERE to order a unique plagiarism free paper done by 

professional writers and delivered before your deadline

Tackling an order may be challenging but we always offer the best. Before the assignment can be passed to you by our writers, it will be passed through a team of qualified editors and proofreaders to ensure that the paper is accurate and of the required quality. Once the editors are satisfied with the assignment, they will forward the assignment to your account and a copy to your email.

Click HERE to order a unique plagiarism free paper done by 

professional writers and delivered before your deadline

Discounts We offer the best prices in the industry. We currently have a 20 percent discount for all of our customers. If you feel the budget is putting a strain on you, contact our live support and they might consider you case. We treat each case differently. Remember that our main goal is to continue with education transformation. At the moment, we only accept payments in form of PayPal.

Click HERE to order a unique plagiarism free paper done by 

professional writers and delivered before your deadline

Why Choose Us While there are many companies in the writing service industry claiming to offer platinum services, none can match the services offered by Infinite Essays. Some of our writers have been with us since 2010. The testimonials that have been written by some of our happy customers is an indication of the good services that we offer.

Click HERE to order a unique plagiarism free paper done by 

professional writers and delivered before your deadline