Spss

reem_o_alyazidi.docx

STAT 510

A study was conducted on teaching methods applied in a certain private school in the US. A sample of 1000 students is considered and data was collected and is available in the dataset Teaching-method posted on blackboard under Content -> Final Exam.

Answer the following questions:

1. List all the variables in the study and identify the type of each variable.

student_id nominal

Teaching method nominal (0=standard, 1=Experimental)

Gender nominal (0=male, 1=female)

Pretest scale

Posttest scale

2. Use SPSS to summarize the data by reporting the descriptive statistics for each of the following variables: Teaching-method, gender, pre-test and post-test

3. Use SPSS to plot a histogram for each of the Scale variables and a bar plot for each of the Nominal variables.

4. At significance level alpha = 0.05, is there a significance difference in the mean Pre-test Scores between the two teaching methods Standard and Experimental? To answer this question follow the steps below and answer each of the following questions: a) The dependent variable is pre-test b) The independent variable is Teaching methodEM

c) The null hypothesis H0 is

H0≠MS=ME

The alternative hypothesis Ha is

Ha≠MS≠ME

d) Are the two samples dependent or independent?

independent

e) Conduct the appropriate test to answer the following research question: at significance level alpha = 0.05, is there a significance difference in the mean Pre-test Scores between the two teaching methods Standard and Experimental?

i. Report t, df, p-value, mean difference and the 95% CI on the mean difference.

ii. State your decision based on the p-value.

iii. State your conclusion and make sure to comment on the mean difference.

5. At significance level alpha = 0.05, is there a significance difference between mean Pretest scores and mean Post-test scores. To answer this question, answer each of the following questions:

a) The dependent variable is _____________

b) The independent variable is _____________