# Project #97306 - Statistics and research

I'm totally lost on these questions and have no clue how to write a research proposal. I am not very goot at PowerPoint at all. Please help!

1) To test the hypothesis in Exercise 1, the admissions counselors select a random sample of freshmen and compare their scores on the SAT to those of the population of upperclassmen. They find that that freshmen do in fat have a higher SAT score. However, what they are unaware of is that the sample of freshmen was not representative of all freshmen at Brainy University. In fact, the sample overrepresented those with high scores and underrepresented those with low scores. What type of error (Type I or Type II) did the counselors make?

2) What are the appropriate Ho and Ha for each of the following research studies? IN addition, note whether the hypothesis test is one or two-tailed.

a) A study in which researchers want to test whether there is a difference in spatial ability between left and right-handed people.

b) A study in which researchers want to test whether nurses who work 8 hour shifts deliver higher quality work than those who work 12 hour shifts.

c) A study in which researchers want to determine whether crate-training puppies is superior to training without a crate.

3) What is the standard error of the difference between means?

4) A college student is interested in whether there is a difference between male and female students in the amount of time spent studying each week. The student gathers information from a random sample of male and female students on campus. Amount of time spent studying is normally distributed. The data follow.

 Male Female 27 25 25 29 19 18 10 23 16 20 22 15 14 19

a)      What statistical test should be used to analyze these data?

b)      Identify Ho and Ha for this study.

c)       Conduct the appropriate analysis.

d)      Should Ho be rejected? What should the researcher conclude?

e)       If significant, compute the effect size and interpret.

f)       If significant, draw a graph representing the data.

5) What are the assumptions of a correlated-groups t test?

6) What measure of effect size is used for a correlated-groups t test?

7) A student decides to conduct the same study using a within-subjects design in order to control for differences in cognitive ability. He selects a random sample of participants and has them study different material of equal difficulty in both music and no music conditions. The data appear below. As before, they are measured on an interval-ratio scale and are normally distributed.

 Music No Music 6 10 7 7 6 8 5 7 6 7 8 9 8 8

a)      What statistical test should be used to analyze these data?

b)      Identify Ho and Ha for this study.

c)      Conduct the appropriate analysis.

d)     Should Ho be rejected? What should the researcher conclude?

e)      If significant, compute the effect size and interpret.

f)       If significant, draw a graph representing the data.

Write a Research Proposal (1,000-1,500 words) on a topic relevant to the course. To complete the Research Proposal, do the following:

Review the Topic 7 lecture section on The Results and Discussion Sections in the Research Proposal for a brief overview pertaining to "how to" complete the assignment.

1. Introductory section: Include hypothesis and a review of the literature.
2. Methodology section: Include subsections on Participants, Apparatus/Materials/Instruments, Procedure, and Design.
3. Results section: Include statistic, critical values, degrees of freedom, and alpha level.
4. Discussion section: Include interpretation of results, ethical concerns, limitations of study, and suggestions for future research.
5. Appendices section: Include a minimum of two appendices (either two figures, two tables, or a figure and a table).
6. Include at least six to eight scholarly references

Prepare this assignment according to the APA guidelines found in the APA Style Guide, located in the Student Success Center. An abstract is not required.

Design a 10-slide PowerPoint presentation (not including title and reference slides) focusing on the Research Proposal: Project Paper (submitted last week). Consider aforementioned elements in the Research Proposal:

1. Introduction/Hypothesis
2. Methodology
3. Results
4. Discussion
5. Appendix

A minimum of two scholarly references

Include a range of 500-750 words in lecture notes to use for your presentation.

 Subject General Due By (Pacific Time) 12/08/2015 12:00 am
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