Problem Set 7.1: \(t\) Test with Related Samples

- Criterion: Differentiate between independent samples, repeated measures, and matched samples.

- Data:

- Scenario A: A researcher wants to know whether men or women spend more money at the movie concession stand. He asks the concession clerk to identify customers as male or female by marking their gender on each saved receipt.

- Scenario B: A CPR instructor wants to know if her students are learning anything during her 90 -minute training. She decides to quiz her students at the beginning of class and again at the end of class.

- Instruction: For each of the two scenarios, identify whether independent samples. repeated measures, or matched samples would be used. Explain how you can make the determination.

Problem Set 7.2. Paired Samples \(t\) Test in SPSS

- Criterion: Calculate a paired samples \(t\) test in SPSS.

- Data: Dr Statistics wanted to test how her leamers scored on a problem set when she presented the problems sequentially versus when she presented the problems randomly. She had 10 learners who scored the following:

Problem Set 7.3. Paired Samples \(t\) Test in SPSS

- Criterion: Analyze a paired samples t test to make the decision about the null hypothesis.

- Data: Use the data from Problem Set 7.2.

- Instruction: Complete the following:

- Compare \(t\) with the one-tailed critical \(t\) at the \(.01 \alpha\) level.

- Answer this: Did the leaners who received sequenced problem sets score significantly higher? Why or why not?

- State your decision about the null hypothesis.

Problem Set 7.4: Confidence Intervals

- Criterion: Calculate a confidence interval in SPSS based on the results of a related samples t test.

- Data: Use the data from Problem Set 7.2.

- Instruction: Answer this: Based on that output, what is the 95 percent confidence interval of the difference?

FORUM DESCRIPTION

Related-Samples t test

Describe a study you would like to explore in your future or current career t test. To help design the study, answer the following:

• Is it a matched groups t test or repeated measures t test and why?

• What is the independent variable?

• What is the dependent variable.

• What do you expect to find if you ran the study? List this out both in statistical language (feel free to make up some numbers for the results) as well as real-world language.

It would reject the null hypothesis, since the observed t-statistic is t(19) = 4.567, p < .001 (made up numbers). Hence, there is sufficient evidence to claim that the Math scores improve after the Math training.

Price: $9.89

Solution: The downloadable solution consists of 3 pages, 689 words and 1 charts.
Deliverable: Word Document