Wednesday
April 16, 2014

Homework Help: stat and research

Posted by anna on Friday, November 23, 2012 at 11:05am.

3. A researcher is interested in whether listening to music helps or hinders test-performance. To control for differences in cognitive level, this researcher decides to use a within-participants design. He selects a random sample of participants and has them study different material of equal difficulty in both the music and no music conditions. Participants take a 20-item quiz on the material. The table below shows the scores on the quiz. The study is completely counterbalanced to control for order effects. The scores obtained are measured on an interval-ratio scale and are normally distributed.
Music No Music
17 17
16 18
15 17
16 17
18 19
18 18

a. What statistical test should be used to analyze the data?

b. Is this a one- or two tailed test?

c. Identify H0 and Ha for this study.

d. Conduct the appropriate analysis. Should H0 be rejected? What should the researcher conclude?

e. Calculate the 95 confidence interval.

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

Science - Name the type of research for each of the following and rank them 1-5...
statistics - A researcher interested in relationships developed a questionnaire ...
statistics - A researcher interested in relationships developed a questionnaire ...
Psychology - What are some problems with the following research study and how ...
Statistics - A researcher interested in relationships developed a questionnaire ...
psy 331 - Wilhelm Wundt is known for his research relating to introspection. ...
Statistics - A researcher interested in relationships developed a questionnaire ...
statistics - A researcher is interested in studying people’s mean age in a ...
statistics - a researcher is interested in studying people's mean age in a ...
STAT - Explain what each of the three most widely used measures of central ...

Search
Members