1. Last fall, a sample of n=36 freshmen was selected to participate in a new 4hour training program designed to improve study skills. To evaluate the effectiveness of the new program, the sample was compared with the rest of the freshman class. All freshmen must take the same English language skills course, and the mean score on the final exam for the entire freshman class was μ = 74. The students in the new program had a mean score of M=79.4 with a standard deviation of s= 18.
a. On the basis of these data, can the college conclude that the students in the new program performed significantly better than the rest of the freshman class? Use a one-tailed test with α = .05
b. Can the college conclude that the students in the new program are significantly different from the rest of the freshman class? Use a two-tailed test with α = .05
2. In a classic study of infant attachment, Harlow (1959) placed infant monkeys in cages with two artificial surrogate mothers. One “mother” was made from bare wire mesh and contained a baby bottle from which the infant could feed. The other mother was made from soft terry cloth and did not provide any access to food. Harlow observed the infant monkeys and recorded how much time per day was spent with each mother. In a typical day, the infants spent a total of 18 hours clinging to one of the two mothers. If there were no preferences between the two, you would expect the time to be divided evenly, with an average of μ =3 hours for each of the mothers. However, the typical monkey spent around 15 hours per day with the terry cloth mother, indicating a strong preference for the soft, cuddly mother. Suppose a sample of n= 9 infant monkeys average M= 15.3 hours per day with SS=216 with the terry cloth mother. Is this result sufficient to conclude that the monkeys spent significantly more time with the softer mother than would be expected if there were no preference? Use a two tailed test with α = .05
3. A researcher would like to examine the effects of humidity on eating behavior. It is known that laboratory rats normally eat an average of μ = 21 grams of food each day. The researcher selects a random sample of n= 16 rats and places them in a controlled atmosphere room in which the relative humidity is maintained at 90%. The daily food consumption scores for the rats are as follows:
14, 18, 21, 15, 18, 18 , 21, 18, 16, 20, 17, 19, 20, 17, 17, 19
a. Can the researcher conclude that humidity has a significant effect on eating behavior? Use a two-tailed test with
α = .05
b. Compute the estimated d and r^2 to measure the size of the treatment effect.
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.
Academic Solvers has put together a group of highly qualified writers with a wide range of expertise in the online writing community. Our goal is to become your one-stop shop for all academic and online writing needs. Take a look at our fantastic service below!
At Academic SolversEditing your research paper could prove to be difficult especially amidst the tight schedules that students have. At academicsolvers.net, we offer research paper editing services. The services include proofreading and use of online platforms such as Grammarly and Turnitin to address any concerns that may arise within the paper. Get our services and you will have satisfactory results.
Custom Research Paper
Writing a research paper could be quite hectic especially if it is your first time. Identifying the research topic, finding the references and interpreting information could pose significant challenges. However, this should not be issues of concern anymore. At academicsolvers.net, we offer solutions to research papers. We deliver plagiarism free and quality research papers that are customized to suit your needs.
Despite writing expertise and skills, you are never guaranteed of error free papers. Academic solvers’ online proofreading services leaves no mistake unaddressed. We go through your paper using a variety of online tools that help to ensure that we edit your paper and make it error free. We have collected a group of experts hence can guarantee quality proofreading services.
Cheap Research Papers
Do you have difficulties writing your research paper? Are you afraid of the cost of hiring a professional to write your research papers? Worry no more. At academicsolvers.net we address both of your problems. We are equipped with a large number of professional writers. Second, we offer our research paper writing services at cheap prices that are largely affordable. Don’t miss this chance. Order our cheap research papers today.
College assignment could be one of the biggest challenges to students especially working with tight schedules. Academicsolvers.net acts to bridge this gap existing between getting satisfactory grades and meeting deadlines. Our college assignment professionals provide students with quality, plagiarism free and confidential assignment help that helps them to achieve desired grades and outcomes.
Essays are some of the most critical elements in the academic life of a student. At academic solvers we prioritize providing quality essays. As such, our professional ensure that they address issues of grammar, structure and plagiarism to provide essays that meet the need of the client. Here, we focus on developing content that aims at addressing the subject in question through the expertise of our professional and experienced writers. Try our services and we guarantee succes.