Statistics for Health Practice

Statistics for Health Practice

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HLTH 615 Quiz 2 Spring 2015 NAME:______________________________________________________________________________ 1. The following data represent the number of times (in the past two months) that two groups of high school students exercised. Students were randomly selected to participate in the study. Group 1 students were randomly assigned to participate in an afterschool program with a focus on healthy living. Group 2 did not participate in the afterschool program. Group1 Group2 16 20 9 5 4 1 23 16 19 2 10 4 5 3 2 0 Test the null hypothesis that there is no statistical difference between the two groups. a. What is the independent variable?_______________________________________(1pt) b. What is the dependent variable?________________________________________(1pt) c. Which analytical test will you use?________________________________________(1pt) Why? (2pts) ______________________________________________________________________________ ______________________________________________________________________________ d. How will you determine significance (one or two tailed?) (alpha level?) (1 pt) ______________________________________________________________________________ ______________________________________________________________________________ e. Calculate & report your results. If statistically significant, be sure to calculate effect size using Cohen’s d. (Results reported should be consistent with APA style.) (5 pts) 1 2. You are a teacher at a gifted school. Your most recent students seems to be brighter than usual. The mean IQ at your school is 127 (S.D.= 8). The mean IQ for your new class is 134. In total, there are 32 students in the new class. Test the null hypothesis that the mean IQ of students in the new class is not higher that of the population IQ parameter.. a. Which analytical test will you use?________________________________________(1pt) Why? (2pts) ______________________________________________________________________________ ______________________________________________________________________________ b. How will you determine significance (one or two tailed?) (alpha level?) (1pt) ______________________________________________________________________________ ______________________________________________________________________________ e. Calculate & report your results consistent with APA guidelines. (5 pts) 2 3. Below is an analytical output for data that is trying to determine if there is a relationship between years of education and income. Years of Education 8 9 11 12 14 14 16 16 18 22 23 Totals: 163 Income (000) 12 15 14 20 28 33 33 45 48 61 81 390 X2 64 81 121 144 196 196 256 256 324 484 529 2651 Y2 144 225 196 400 784 1089 1089 2025 2304 3721 6561 18538 XY 96 135 154 240 392 462 528 720 864 1342 1863 6796 a. What is your null hypothesis? (1 pt) ______________________________________________________________________________ ______________________________________________________________________________ b. What is the independent variable?________________________________________(1pt) c. What is the dependent variable?________________________________________(1pt) d. Which analytical test will you use?________________________________________(1pt) Why? (1pt) ______________________________________________________________________________ ______________________________________________________________________________ e. Calculate & provide a brief yet thorough interpretation of your findings, using APA guidelines to report the result. (5 pts) 3 3. Review the statements below. CIRCLE the type of hypothesis (null; research/alternative) each statement reflects. If the statement is null, write the research hypothesis; if the statement is a research hypothesis, write the null hypothesis. (2 pts each) Ho or a. The incidence of depression is higher for men than for women. Ha _________________________________________________________________________ _________________________________________________________________________ Ho or b. There are no racial differences in intelligence. Ha _________________________________________________________________________ _________________________________________________________________________ c. Women are more irritable during their premenstrual phase of their cycle than at other Ho or times. Ha _________________________________________________________________________ _________________________________________________________________________ d. A high score on the test of spatial ability predicts success as an electrician. Ho or Ha _________________________________________________________________________ _________________________________________________________________________ e. With regard to social behavior, any observed differences between males and females are Ho or due to chance. Ha _________________________________________________________________________ _________________________________________________________________________ 4a. Complete the table below to indicate when decisions to accept/reject a hypothesis is CORRECT, or when the decision results in a Type I (alpha) error or Type II (beta) error. (2 pts) Summary of Type I and Type II Errors When H0 is true When H1 is true Do not reject H0 Reject H0 4b. With respect to a hypothesis decision, identify the difference between Type 1 and Type 2 errors. (3 pts) _________________________________________________________________________ _________________________________________________________________________ _________________________________________________________________________ _________________________________________________________________________ 4 …

You must proofread your paper. But do not strictly rely on your computer’s spell-checker and grammar-checker; failure to do so indicates a lack of effort on your part and you can expect your grade to suffer accordingly. Papers with numerous misspelled words and grammatical mistakes will be penalized. Read over your paper – in silence and then aloud – before handing it in and make corrections as necessary. Often it is advantageous to have a friend proofread your paper for obvious errors. Handwritten corrections are preferable to uncorrected mistakes.

Use a standard 10 to 12 point (10 to 12 characters per inch) typeface. Smaller or compressed type and papers with small margins or single-spacing are hard to read. It is better to let your essay run over the recommended number of pages than to try to compress it into fewer pages.

Likewise, large type, large margins, large indentations, triple-spacing, increased leading (space between lines), increased kerning (space between letters), and any other such attempts at “padding” to increase the length of a paper are unacceptable, wasteful of trees, and will not fool your professor.

The paper must be neatly formatted, double-spaced with a one-inch margin on the top, bottom, and sides of each page. When submitting hard copy, be sure to use white paper and print out using dark ink. If it is hard to read your essay, it will also be hard to follow your argument.

ADDITIONAL INSTRUCTIONS FOR THE CLASS

Discussion Questions (DQ)

Initial responses to the DQ should address all components of the questions asked, include a minimum of one scholarly source, and be at least 250 words.
Successful responses are substantive (i.e., add something new to the discussion, engage others in the discussion, well-developed idea) and include at least one scholarly source.
One or two sentence responses, simple statements of agreement or “good post,” and responses that are off-topic will not count as substantive. Substantive responses should be at least 150 words.
I encourage you to incorporate the readings from the week (as applicable) into your responses.

Weekly Participation

Your initial responses to the mandatory DQ do not count toward participation and are graded separately.
In addition to the DQ responses, you must post at least one reply to peers (or me) on three separate days, for a total of three replies.
Participation posts do not require a scholarly source/citation (unless you cite someone else’s work).
Part of your weekly participation includes viewing the weekly announcement and attesting to watching it in the comments. These announcements are made to ensure you understand everything that is due during the week.

APA Format and Writing Quality

Familiarize yourself with APA format and practice using it correctly. It is used for most writing assignments for your degree. Visit the Writing Center in the Student Success Center, under the Resources tab in LoudCloud for APA paper templates, citation examples, tips, etc. Points will be deducted for poor use of APA format or absence of APA format (if required).
Cite all sources of information! When in doubt, cite the source. Paraphrasing also requires a citation.
I highly recommend using the APA Publication Manual, 6th edition.

Use of Direct Quotes

I discourage overutilization of direct quotes in DQs and assignments at the Masters’ level and deduct points accordingly.
As Masters’ level students, it is important that you be able to critically analyze and interpret information from journal articles and other resources. Simply restating someone else’s words does not demonstrate an understanding of the content or critical analysis of the content.
It is best to paraphrase content and cite your source.

LopesWrite Policy

For assignments that need to be submitted to LopesWrite, please be sure you have received your report and Similarity Index (SI) percentage BEFORE you do a “final submit” to me.
Once you have received your report, please review it. This report will show you grammatical, punctuation, and spelling errors that can easily be fixed. Take the extra few minutes to review instead of getting counted off for these mistakes.
Review your similarities. Did you forget to cite something? Did you not paraphrase well enough? Is your paper made up of someone else’s thoughts more than your own?
Visit the Writing Center in the Student Success Center, under the Resources tab in LoudCloud for tips on improving your paper and SI score.

Late Policy

The university’s policy on late assignments is 10% penalty PER DAY LATE. This also applies to late DQ replies.
Please communicate with me if you anticipate having to submit an assignment late. I am happy to be flexible, with advance notice. We may be able to work out an extension based on extenuating circumstances.
If you do not communicate with me before submitting an assignment late, the GCU late policy will be in effect.
I do not accept assignments that are two or more weeks late unless we have worked out an extension.
As per policy, no assignments are accepted after the last day of class. Any assignment submitted after midnight on the last day of class will not be accepted for grading. Statistics for Health Practice

Communication

Communication is so very important. There are multiple ways to communicate with me:
Questions to Instructor Forum: This is a great place to ask course content or assignment questions. If you have a question, there is a good chance one of your peers does as well. This is a public forum for the class.
Individual Forum: This is a private forum to ask me questions or send me messages. This will be checked at least once every 24 hours. Statistics for Health Practice

Statistics for Health Practice