Statistics in Psychology

HI, I’m taking an online Statistics in Psychology class.  I have weekly assignments and a few tests.  This class is the only class keeping me from graduating.  I’ve talked to three people on here already who said they could help and didn’t.  The program for this couse is SPSS and I guess this is what’s turing people away???  Please let me know if you can do my assignments and test in this course and please let me know your fees.  My weekly assignments are due on Mondays and I have my first test due this Friday.  I’m uploading one of my assignments on here so you can get an idea of what to expect.

PSYC 355

Lesson 24, Exercises 1-5

Billie wishes to test the hypothesis that overweight individuals tend to eat faster than normal-weight individuals. To test this hypothesis, she has two assistants sit in a McDonald’s restaurant and indentify individuals who order the Big mac special (Big Mac, large fries, and large coke) for lunch. the big mackers, as they are affectionately called by the assistants, are classified as overweight, normal-weight, or neither overweight nor normal weight. the assistants identify 10 overweight and 30 normal-weight big mackers. the assistants record the amount of time it takes for the individuals to complete their big mac special meals. the spss data file contains two variables, a grouping variable with two levels, overweight (= 1) and normal weight (= 2), and time in seconds to eat the meal.

1. compute an independent-sample t test on these data. report the t values and the p values assuming equal population variances and not assuming equal population variances.

2. on the output, identify the following:

a. Mean eating time for overweight individuals

b. standard deviation for normal weight individuals

c. results for the test evaluating homogeneity of variances

3. compute an effect size that describes the magnitude of the relationship between weight an d the speed of eating big mac meals.

4. write a results section based on our analyses.

5. if you did not include a graph in your results section, create a graph in apa format that shows the differences between the two groups.

SPSS Homework 2 Instructions: Independent Samples (Independent Means) t Tests (40 points)

Part One:

Green & Salkind: Lesson 24, Exercises 1-5

The following helpful tips are numbered to correspond with the exercise number to which they refer:

1. Type these values out underneath your copied and pasted output.

2. Instead of identifying these values on your output, as the text states, please write them into your Word file as written answers for #2 a, b, and c.

3. The effect size statistic must be computed by hand (or calculator!). Use the second “easier” formula for d found in the section on Effect Size Statistics in this lesson.

4. All homework “Results sections” should follow the example given in the Course Content document “Writing Results of Statistical Tests in APA Format” (note: you do not have to refer to a figure).

5. Create a boxplot (not an error bar graph) using the following steps (covered also in Lesson 21):

a. Go to Graphs—Legacy Dialogs—Boxplot—Select “Simple”—Select “Summaries for Groups of Cases”

b. Click “Define”: Variable = “Time Spent” (this is your dependent variable) and Category Axis = “Weight” (this is your independent, or grouping, variable)

c. OK

Part Two:

1. A learning psychologist is interested in comparing the success of 2 different foreign language learning programs. He assigns students to two different classes, one that focuses on a more academic style including lectures and worksheets, and one that focuses on a more conversational style including repetition and group work. He then administers a standardized language exam to each group of students. Using the table below, enter the data into a new SPSS data file and use a t-test for independent means to analyze the claim that the two teaching styles are different.

The steps will be the same as the ones you have been practicing in Part One of the assignment—the only difference is that you are now responsible for creating the data file as well. Remember to name and define your variables under the “Variable View,” then return to the “Data View” to enter the data.

Academic

Conversational

154
101
85
94
172
203
124
52
93

193
102
239
227
128
203
249
243
178

2. Create a boxplot illustrating the differences between the two methods of language learning.

3. Write an APA-style results section describing the outcome. All homework “Results sections” should follow the example given in the Course Content document “Writing Results of Statistical Tests in APA Format” (note: you do not have to refer to a figure).

Part 3: Cumulative Homework

1. The effects of alcohol intake on aggressive driving are studied in a group of students tested on a driving simulator. One group of fifteen students are tested first with a placebo, given an ounce of alcohol, waited 30 minutes and were tested again. Number of crashes are counted. Did consuming alcohol increase aggressive driving? Choose the correct test to analyze this question, set up the SPSS file, and run the analysis. Follow the directions under the table below.

Placebo

Alcohol

7
7
5
8
10
13
12
11
11
15
8
9
7
7
6

10
15
12
8
5
21
10
11
13
20
8
9
17
18
19

a) Paste appropriate SPSS output.

b) Paste appropriate SPSS graph.

c) Write an APA-style results section describing the outcome. All homework “Results sections” should follow the example given in the Course Content document “Writing Results of Statistical Tests in APA Format” (note: you do not have to refer to a figure).

This assignment is due by 11:59 p.m. (ET) on Monday of Module/Week 2.

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