A recent national survey found that high school students watched an average (mean) of 7.2 movies per month with a population standard deviation of 0.7. The distribution of number of movies watched per month follows the normal distribution. A random sample of 47 college students revealed that the mean number of movies watched last month was 6.2. At the 0.05 significance level, can we conclude that college students watch fewer movies a month than high school students?
H0: μ ≥ 7.2; H1: μ < 7.2
H0: μ = 7.2; H1: μ ≠ 7.2
H0: μ > 7.2; H1: μ = 7.2
H0: μ ≤ 7.2; H1: μ > 7.2
Reject H1 if z < –1.645
Reject H0 if z > –1.645
Reject H1 if z > –1.645
Reject H0 if z < –1.645
Reject H0
Do not reject H0
In: Statistics and Probability
A researcher wanted to know the determinants of SAT scores in the United States of America. Using data from 4,137 survey respondents, the following equation was estimated:
????̂= 1,028.10 + 19.30ℎ???? −2.19ℎ????2
−45.09?????? −169.81 ????? +62.31??????.?????
Standard Error: (6.29) (3.83) (0.53) (4.29) (12.71) (18.15)
R2: 0.0858 n = 4,137
where Sat is the combined SAT score, hsize is the size of the
student’s high school graduating class, in hundreds, female is a
gender dummy variable, and black is a race dummy variable equal to
one for blacks and zero otherwise.
(i) Is there strong evidence that hsize2 should be included in the
model? From this equation, what is the optimal high school
size?
(ii) Holding hsize fixed, what is the estimated difference in SAT score between nonblack females and nonblack males? How statistically significant is this estimated difference?
(iii) What is the estimated difference in SAT score between nonblack males and black males? Test the null hypothesis that there is no difference between their scores,
against the alternative that there is a difference.
(iv) What is the estimated difference in SAT score between black
females and nonblack females? What would you need to do to test
whether the difference is statistically
significant?
In: Statistics and Probability
Kate is a 17 years old patient, unmarried and 8 weeks pregnant. She is a rather remarkable girl in that she lives independently while still a senior in a high school. She tells you that she was an adoptee given back to foster care, and then abused in that system. She is now an emancipated minor who works 30 hours per week at a service industry job while also earning a 4.0 GPA in school, ranking in the top 10% of her class. She is college-bound, with a full-ride scholarship for pre-med undergraduate studies at a prestigious university. ?Kate has absolutely no family support, and the former boyfriend who is the father of her unborn child/fetus simply disappeared upon learning of the pregnancy. Your patient is scared, uninsured, and says she doesn’t want to be pregnant or a mom (“Perhaps someday, but not now!”). She rejects the adoption option, based on her own experience growing up, and requests abortion only, at this hospital where she has always received medical care.”
Questions for discussion ?1. Your faith-based health care system rejects elective abortion option. What ought to be done for Kate? And by whom?
In: Nursing
Psychologist Robert Rosenthal (1973) reports about an experiment at the U.S. Air Force Academy Preparatory School. One hundred airmen were randomly assigned to five different math classes. Each teacher was told that his or her students were placed in groups based on high or low ability when in reality the airmen were randomly assigned to each group. The outcome showed that students in classes labeled “high-ability” improved much more in math scores than those labeled as “low-ability.” Remember, the groups were randomly assigned and not based on high or low ability. What happened is that the teachers subtly communicated their expectations, and the students performed accordingly. What are some ways that teachers communicate their expectations about the ability of students to the class? Why is this study so important for all teachers? Students in kindergarten are placed into different reading groups based on ability. Do these beginning students know who is in the “smart” group and who is in a lower reading group? How does this affect each student’s self-opinion? Could this self-opinion affect the quality of work? If a student begins the education process as labeled in a group, do these labels last throughout elementary, middle, and high school?
In: Psychology
Reflecting on resources you locate in professional literature, consider the types of career-planning information and resources you might draw from when exploring career-related issues with clients and students.
For this discussion, imagine that you are working with a 17-year-old adolescent and his family. They have come to see you because the teen is not attending school regularly and states that he intends to drop out because school is boring and he wants to start working and be treated like an adult. His parents state that they are willing to treat him like an adult if he prepares for his future appropriately and can demonstrate that he will be able to find a job he enjoys and earn enough income to support himself. He is not sure what kind of career path he would like to follow and would consider vocational training.
1) Discuss in your post how you would move forward with the teen and his family to address any concerns that may arise about the teen's success in finding an appropriate job or vocational training placement, as well as what type of follow-up and evaluation you would include about this issue in future counseling sessions.
In: Psychology
1. A. An educational psychologist is studying student motivation in elementary school. A sample of n=5 students is followed over 3 years from fourth to sixth grade and measurements of motivation are taken. The following data are obtained:
Student Fourth Fifth Sixth
A 4 3 1
B 8 6 4
C 5 3 3
D 7 4 2
E 6 4 0
Test the differences at .05.
B. Use Tukey’s HSD to report which groups are different.
C. Use a post hoc
t-test to look at the differences between fourth and sixth
grade.
2 A. An educational psychologist is studying student motivation in elementary school. A sample of n=15 students, 5 from each grade from fourth to sixth grade and measurements of motivation are taken. The following data are obtained:
Fourth Fifth Sixth
4 3 1
8 7 0
3 3 2
5 5 2
5 4 0
Test the differences at .05.
B. Use Scheffe’s to compare fourth and sixth.
C. Use a post hoc t-test to look at the differences between fourth and sixth grade.
In: Statistics and Probability
Jefferson is a grade school teacher whose annual income from teaching is $30,000. He has always enjoyed bowling, and his local pro urged him to turn professional. He subsequently begins working for the pro as an unpaid assistant and enters an apprenticeship program with the Professional Bowlers’ Association of America (PBA). As an apprentice, he accumulates credits toward becoming a member of the PBA by taking approved classes, working as an assistant pro, and competing in pro tournaments. Jefferson expects to be approved as a full member of the PBA next year.
Although Jefferson continues to teach full-time, he goes to the bowling alley each day after school and practices after fulfilling his duties as an unpaid assistant. During the summer, he spends 12 to 15 hours each day at the bowling alley. In addition, he participates in as many PBA tournaments as he can work into his schedule.
Jefferson has come to you for advice on the deductibility of the expenses he has incurred in his bowling career. Since deciding to turn pro, he has won money in tournaments every year. However, his expenses have exceeded his earnings by $5,000 to $10,000 per year. What can be deducted?
In: Accounting
Problem 2-29
Zoo Extravaganza is a not-for-profit organization. Zoo Extravaganza took over thecounty zoo, with the provision that the county would provide a subsidy for itsoperations. The county provides $7,000 per month. The rest of the zoo’s revenuescomes from admission charges, which are as follows: $20 for a family admission (theaverage family has four people), $3 per child in school groups, $5 per child ticketwhen not in a school group, and $8 per adult ticket.Each ticket entitles the visitor to ride on the “Train Around the Zoo.” However, only one-thirdof all visitors actually ride the train.The zoo expects the following number of visitors per month:Visitor TypeMonthly Number of Admission TicketsAdult800Child950Schoolchild1,000Families300The zoo has the following monthly expenses in four general areas:Administration $ 12,000Zoo staff$ 10,000Train rides$ 1 per person who rides the trainMaintenance$ 1 per visitor determine the operating budget per month. Show revenues and expenses by line-item, and show the expected profit or loss
Refer to probelm 2-29 in chapter 2. Assuming that the mix of visitors does not change, provide a budget assuming admissions, are 10 percent lower and 10 percent higher than expected?
In: Finance
Your facility is a large children’s hospital in north Texas. Until recently your facility was part of a larger health care facility run by the state. The facility is now corporately owned and operated. During this reorganization period a major fire occurred at a local elementary school. Over 100 injured children were sent to your facility for care. You encountered many problems: care was delayed and inappropriate for many children because of the nature of their injuries due to lack of parental consent for treatment and smoke inhalation and burns. Your task is to develop a disaster plan specifically to address the deficiencies and to reshape your public image following the fire at the elementary school.
Using this case.
Write a 1 page report: 1” margins, single-spaced, 12-point font, Word document format (.doc or .docx)
Describe your facility
Describe your staff
Explain any legal or ethical issues of the situation
Explain your management style/theory
Discuss cultural issues that the situation presents
Explain budgetary plans or concerns
Explain credentialing or accreditation issues the situation present
Describe your response to the situation
IN YOUR OWN WORDS PLEASE DON´T COPY AND PASTE
In: Nursing
The College Board provided comparisons of Scholastic Aptitude Test (SAT) scores based on the highest level of education attained by the test taker's parents. A research hypothesis was that students whose parents had attained a higher level of education would on average score higher on the SAT. The overall mean SAT math score was 514. SAT math scores for independent samples of students follow. The first sample shows the SAT math test scores for students whose parents are college graduates with a bachelor's degree. The second sample shows the SAT math test scores for students whose parents are high school graduates but do not have a college degree.
| 485 | 503 |
| 518 | 549 |
| 650 | 526 |
| 570 | 394 |
| 566 | 499 |
| 556 | 594 |
| 513 | 448 |
| 576 | 469 |
| 442 | 492 |
| 580 | 478 |
| 479 | 425 |
| 486 | 485 |
| 528 | 390 |
| 524 | 535 |
39 is the point estimate of the difference between the means for the two populations.
A. Find the value of the test statistic. (Round your answer to three decimal places.)
B. Compute the p-value for the hypothesis test. (Round your answer to four decimal places.)
In: Statistics and Probability