Question

1. What is our t-critical if we have a sample of 35 people and want to use an alpha of .05, where our hypothesis specifies direction?

2. What is our t-critical if our sample has 96 people, we want to use an alpha of .01, and do not have hypotheses which include direction?

3. Given a sample of 68 women, with an estimated standard error of 2.5 and a sample mean of 15, construct a confidence interval for a one-tailed test with an alpha of .05.

4. Franklin conducts a survey as a part of his PSYC 406 research project, trying to determine if having individuals watch romantic comedies affects their mood. In his survey he uses a measure of mood, which contains a 7 point scale ranging from 1 – 7. His sample includes 45 people, with a SS = 1, 219 and a mean rating on the survey of a 4.57. Using an alpha = .05, answer the following questions.
   1. Write out his null and alternative hypotheses.

2. What is his t-critical value(s)?

3. What is the estimated standard error?

4. Compute the t-statistic.

5. What is the effect size?

6. Make a decision regarding the null and provide a conclusion in proper notation.

5. Zaxby’s wants to know if their advertising during the NCAA tournament altered the sales of their wings and things plate that was being shown in their commercials. They decide to use the location on 74 as a test location. On an average day they sell 239 wings and things plates. Taking a sample of 17 days during the tournament, they find that they sold 250 wings and things plates on average, with a standard deviation of 16 plates. Using an alpha = .05, answer the following questions.
   1. What are their null and alternative hypotheses?

2. What is their t-critical value(s)?

3. What is the estimated standard error?

4. Compute the t-statistic.

5. What is the effect size?

6. Make a decision regarding the null and provide a conclusion in proper notation.

Answer 1

First three independent question have been solved. Please post other questions separately to get answered.