# fill out the file attached according to the data

1. Recall that the dataset, Stat_grades.sav, contains data for a sample of 105 statistics students. One of the variables in this dataset is called, **gender**. This variable is either “1” for “Female”, or “2” for “Male”.__ The Instructor is wondering if gender affects student performance as measured using Final Course Percentage (called Percent) .__Using the

__appropriate__statistical test, methods, and evaluations, determine if

**Gender**made a

*significant difference*in

**Final Course Percent**. Be sure to include each step of the process, any SPSS results used, an interpretation of the results, and the final conclusions.

(a) What is the hypothesis being tested here?

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(c) What is the name of the test you will run? Run the appropriate SPSS test and include the SPSS output here.

(d) What are the results of the test? What is the p-value and is it larger or smaller than the alpha value – show your work and explain the result.

(e) Write a conclusion for the above in plain English so that any person could understand. What can you say about gender and its effect on overall performance?

2. Based on many years of past classes and experience, the Instructor for the students in the Stat_Grades.sav dataset has determined that a*successful*mean value for **Total Points**is 90 points. Does the **Total Points**for the students in Stat_Grades.sav differ significantly from the known success value of 90 points? Use and include the appropriate statistical test, methods, and evaluations. Be sure to include each step of the process, any SPSS results used, an interpretation of the results, and final conclusions.

(a) What is the hypothesis being tested here?

(b) What are Ho and Ha?

(c) What is the name of the test you will run? Run the appropriate SPSS test and include the SPSS output here.

(d) What are the results of the test? What is the p-value? Compare the p value to alpha and note the result.

(e) Explain the conclusion in plain English so that any person could understand. Did the students in Stat_Grades.sav do significantly differently than the population mean of 90? How did they do and what did you find? Explain.

3. Using the Stat_Grades.sav dataset, compare **Quiz 1**and **Quiz 2 **to determine if there is a statistically significant difference in the average student performance between these two quizzes. Use and include the appropriate statistical test, methods, and evaluations. Be sure to include each step of the process, any SPSS results used, an interpretation of the results, and final conclusions.

(a) What is the hypothesis being tested here?

(b) What are Ho and Ha?

(c) What is the name of the test you will run? Run the appropriate SPSS test and include the SPSS output here.

(d) What are the results of the test? What is the p-value? Compare the p value to alpha and note the result.

(e) Explain the result and conclusion of the test in plain English so that any person could understand.

4. Use the following SPSS output to answer these questions. **The hypothesis here is: “Is there a significant difference in Final Exam Points between lower division students and upper division students (variable: lowup)?”**

(a) What is Ho and Ha?

(b) What t-test is being used?

(c) What is the p value? (Assume equal variances)

(d) Using alpha at .05, what is the result of this test?

(e) Write the full conclusion for this test in plain English so anyone can understand.

(f) How many Lower Division students are in this sample of data? Is the mean points for lower division students different than it is for upper division students? Is it *significantly different*? What does it mean to be *significantly different *(versus just different)?