A school psychologist is interested in the effect a popular new hypnosis technique on anxiety. The psychologist collects a sample of 30 students and gives them the hypnosis once a week for two months. Afterwards the students fill out an anxiety inventory in which their mean score was 55.08. Normal individuals in the population have an anxiety inventory mean of 50 with a variance of 7.29. What can be concluded with α = 0.10?

a) What is the appropriate test statistic?
---Select--- na, z-test, one-sample t-test, independent-samples t-test, related-samples t-test

b)
Population:
---Select--- normal individuals, students receiving hypnosis, new hypnosis, technique two months
Sample:
---Select--- normal individuals, students receiving hypnosis, new hypnosis, technique two months

c) Obtain/compute the appropriate values to make a decision about H₀.
(Hint: Make sure to write down the null and alternative hypotheses to help solve the problem.)
critical value = _________; test statistic = ______________
Decision:  ---Select--- Reject H0, Fail to reject H0

d) If appropriate, compute the CI. If not appropriate, input "na" for both spaces below.
[ _________ ,___________ ]

e) Compute the corresponding effect size(s) and indicate magnitude(s).
If not appropriate, input and select "na" below.
d = __________;   ---Select--- na, trivial effect, small effect, medium effect, large effect
r² = ___________ ;   ----Select--- na, trivial effect, small effect, medium effect, large effect

f) Make an interpretation based on the results.

A) The population has significantly lower anxiety than students that underwent hypnosis.

B) The population has significantly higher anxiety than students that underwent hypnosis.    

C) The new hypnosis technique does not significantly effect anxiety.

1) An elementary school teacher is interested in assessing the effectiveness of a new technique for the students to learn their spelling words. He learns a new technique over the summer and is eager to find out if it really works better. He wants to be able to make a comparison and knows he needs two groups. He decides that he will use the new technique for the group of students learning the harder spelling words and the old technique for those learning the easier spelling words. He compares average spelling performance for the two techniques. What is the biggest threat to the internal validity?

A) testing effect

B) history effect

C) attrition / maturation effect

D) selection effect

2) In this example, identify a confounding variable:

A nutritionist is investigating the effects of eating oatmeal for breakfast. He asks all of his participants to eat about 350 calories for breakfast every day for six months. He assigns the experimental group to eat oatmeal with honey. He asks the control group to eat anything other than oatmeal and honey. He then tests their blood levels for cholesterol and other substances.

A) eating oatmeal

B) eating honey

C) eating 350 calories for breakfast

D) eating breakfast

3) In this example, identify a confounding variable:

A school psychologist hypothesizes that fear negatively influences test performance. To test this, one group of 100 students watches a video containing fear provoking images of spiders crawling on people. The other group of 100 students listens to soothing jazz music. Both groups take a test of their general knowledge.

A) fear

B) students

C) school psychologist

D) visual stimulation

Organizations that emphasize social responsibility and adhere to a set or corporate ethics will likely gain competitive advantages in the market place and avoid costly litigation and loss of reputation. Due to high levels of corporate fraud in the 1990s with companies such as Enron and Global Crossing, Congress passed the Sarbanes Oxley Act of 2002 that set new increased standards for the boards of public U.S. companies and accounting firms. Read the different sections and provisions of the Sarbanes Oxley Act at the following link. http://www.soxlaw.com/ Discuss your overall thoughts on the Sarbanes Oxley Act and the provision that you feel is the most effective and why. Additionally do you believe that executives will become more ethical based on the legislation? Why or why not?

Select the taxpayer who is an eligible educator for the educator expenses deduction.

Kris is a teacher's aide at John F. Kennedy Elementary School. She worked 671 hours in 2018. Kris spent $127 on supplies she used in the classroom. She was not reimbursed for her expenses.

Frieda is a kindergarten teacher at Lakeview Elementary School. She worked 1,080 hours in 2018. Frieda spent $427 on supplies for her classroom. She was not reimbursed for her expenses.

Cami homeschooled her five children, Summer, Renna, Jaquin, Julie, and Benji. She taught her children for 1,187 hours in 2018. Cami spent $753 on curriculum for her children. She was not reimbursed for her expenses.

Heidi is the principal at New Haven Elementary School. She worked 855 hours in 2018. Heidi spent $427 on books and supplies for two classrooms with new teachers. She was not reimbursed for her expenses.

Mark for follow up

Why did most countries of Latin America fall into a debt crisis in the early 1980s? Discuss the general problem of a “debt trap” and national dollar capital inflows and outflows. Then discuss 2 general trends of the 1970s and 2 specific trigger events of the 1980s which caused the crisis.

A very good comprehensive analysis of technological and legal competitiveness of the countries is published yearly by the world economic forum. Discuss the position of Mexico vs Latin America in the most relevant categories. (data set is posted in Canvas). Read: “13 facts about Mexico’s growing technology scene.”

JCPenney has recognized numerous opportunities to expand in foreign countries and has assessed many foreign markets, including Brazil, Greece, Mexico, Portugal, Singapore, and Thailand. It has opened new stores in Europe, Asia, and Latin America. In each case, the firm was aware that it did not have sufficient understanding of the culture of each country that it had targeted. Consequently, it engaged in joint ventures with local partners who knew the preference of the local customers.

a). What comparative advantage does JCPenney have when establishing a store in a foreign country, relative to an independent variety store?

b). Why might the overall risk of JCPenney decrease or increase as a result of its recent global expansion?

c). JCPenney has been more cautious about entering China. Explain the potential obstacles associated with entering China.

3. The following research studies were conducted as completely randomized designs with a single treatment factor. Identify: (1) the treatment factor, (2) the number of treatments, (3) the experimental unit, (4) the sampled population(s), and (5) the response variable (or dependent variable).

(a) Six secondary schools are randomly selected from the Georgetown Schools. Two schools are randomly assigned to each of three assessment methods. Scores for reading are obtained for each school at the end of the school year.

(b) The amount of lead is measured in the exhaust emissions of two new BMW E series, two new Toyota Premio and two new Nissan Xtrail. The autos were randomly selected from a single day's production run at each of the three auto factories where the autos were manufactured.

Problem 4. Suppose the weights of seventh-graders at a certain school vary according to a Normal distribution, with a mean of 100 pounds and a standard deviation of 7.5 pounds. A researcher believes the average weight has decreased since the implementation of a new breakfast and lunch program at the school. She finds, in a random sample of 35 students, an average weight of 98 pounds.

What is the P-value for an appropriate hypothesis test of the researcher’s claim?