Adequate Preparation for Retirement. In 2018, RAND Corporation researchers found that 71% of all individuals ages 66 to 69 are adequately prepared financially for retirement. Many financial planners have expressed concern that a smaller percentage of those in this age group who did not complete high school are adequately prepared financially for retirement.

a. Develop appropriate hypotheses such that rejection of H0 will support the con-clusion that the proportion of those who are adequately prepared financially for retirement is smaller for people in the 66–69 age group who did not complete high school than it is for the population of the 66–69 year old.
b. In a random sample of 300 people from the 66–69 age group who did not complete high school, 165 were not prepared financially for retirement. What is the p-value for your hypothesis test?
c. At a 5 .01, what is your conclusion?

6.73 Attitudes toward school. The Survey of Study Habits and Attitudes (SSHA) is a psychological test that measures the motivation, attitude toward school, and study habits of students. Scores range from 0 to 200. The mean score for U.S. college students is about 95, and the standard deviation is about 20. A teacher who suspects that older students have better attitudes toward school gives the SSHA to 25 students who are at least 30 years of age. Their mean score is ¯x = 103.3.

1. Assuming that σ = 30 for the population of older students, carry out a test of

   H₀: μ = 95

   H_a: μ > 95

   Report the P-value of your test, and state your conclusion clearly.

2. Your test in part (a) required two important assumptions in addition to the assumption that the value of σ is known. What are they? Which of these assumptions is most important to the validity of your conclusion in part (a)?

. A teaching assistant for Statistics course as a university collected data from students in her class to investigate whether study time per week (average number of hours) differed between students who planned to go to graduate school and those who did not. The data were as follows:

Graduate school: 15, 7, 15, 10, 5, 5, 2, 3, 12, 16, 15, 37, 8, 14, 10, 18, 3, 25, 15, 5, 5

No graduate school: 6, 8, 15, 6, 5, 14, 10, 10, 12, 5.

State the null and alternative hypotheses using statistical notations. Use R command t.test to test whether study time differed between two groups. Include your R output and identify the test statistic and p-value. Draw the conclusion.

Theory Questions 1.

The Kyrgios Database Group has about 120 employees. Each employee has an ID, a firstname and a surname. Each employee belongs to a department. The organisation has around 6 departments. Each department has a department code and a departmentname. • Create an ERD solution based on the above narrative. ERD Diagram

Question 2.

The Tomic Primary School wishes to democratically choose which animal will become the school mascot. The list of alternatives includes Kangaroo, Koala, Tiger, Elephant, Parrot, Penguin… Each student may vote for one or more of the animals to be the mascot. Each student has a student Id and name. Each of the animals has been assigned a numeric id and name (e.g. 7 Tiger). The school want to be able to store all of the votes made by students in a database. • Create an ERD solution based on the above narrative. ERD Diagram

Required Lump-Sum Payment

To complete your last year in business school and then go through law school, you will need $20,000 per year for 4 years, starting next year (that is, you will need to withdraw the first $20,000 one year from today). Your uncle offers to put you through school, and he will deposit in a bank paying 8.4% interest a sum of money that is sufficient to provide the 4 payments of $20,000 each. His deposit will be made today.

1. How large must the deposit be? Round your answer to the nearest cent.
   
   
2. How much will be in the account immediately after you make the first withdrawal? Round your answer to the nearest cent.
   
   
   How much will be in the account immediately after you make the last withdrawal? Round your answer to the nearest cent. Enter "0" if required

Islamic parent: “My child’s school has many Christian-based activities and has never even recognized that some of the students are not Christian.”

Single parent: “I feel that all my son’s behavior at school is blamed on the fact that I’m a single parent, and that many judgments about our family are made based on no other evidence than our ‘single parent family’ status.”

Vietnamese parent: (translated from Vietnamese) “My children speak and read better English than I do. It is so hard when lots of letters and information come home from school in English. I also feel that my children are losing respect for their parents and the elders in this country.”

Required Lump-Sum Payment

To complete your last year in business school and then go through law school, you will need $20,000 per year for 4 years, starting next year (that is, you will need to withdraw the first $20,000 one year from today). Your uncle offers to put you through school, and he will deposit in a bank paying 8.61% interest a sum of money that is sufficient to provide the 4 payments of $20,000 each. His deposit will be made today.

1. How large must the deposit be? Round your answer to the nearest cent.
   $  
   
2. How much will be in the account immediately after you make the first withdrawal? Round your answer to the nearest cent.
   $  
   
   How much will be in the account immediately after you make the last withdrawal? Round your answer to the nearest cent. Enter "0" if required
   $  

. In the provided scenario, you address the time value of money also known as discounted cash flow analysis. This type of analysis is crucial to being able to viably analyze financial statements.

The start-up firm you founded is trying to save $10,000 in order to buy a parcel of land for a proposed small warehouse expansion. In order to do so, your finance manager is authorized to make deposits of $1250 per year into the company account that is paying 12% annual interest. The last deposit will be less than $1250 if less is needed to reach $10,000.

o How many years will it take to reach the $10,000 goal and how large will the last deposit be? Show your work.

Explain the work please.

In the provided scenario, you address the time value of money also known as discounted cash flow analysis. This type of analysis is crucial to being able to viably analyze financial statements.

The start-up firm you founded is trying to save $10,000 in order to buy a parcel of land for a proposed small warehouse expansion. In order to do so, your finance manager is authorized to make deposits of $1250 per year into the company account that is paying 12% annual interest. The last deposit will be less than $1250 if less is needed to reach $10,000.

o How many years will it take to reach the $10,000 goal and how large will the last deposit be? Show your work.

Consider the following hypothetical scenario: The city council has just approved the construction of an amusement park in your town. You are responsible for studying the impact of the new amusement park on the local economy and the surrounding community. Write a paper of approximately 500 words that addresses all of the questions below. Include the graphs, where indicated: o Question 1: You know that the amusement park will increase the traffic flow in the streets around the amusement park. There are both businesses and neighborhoods adjacent to the increased traffic flow. The cost to the community is estimated to be $6 per person.  What kind of externality is this? Why? o Graph the market for amusement park business, labeling the demand curve, the social-value curve, the market equilibrium level of output, and the socially optimal level of output.  What is the per-unit amount of the externality? o Question 2. You know that the amusement park will have events in the evening. This will increase both foot traffic and street traffic at night. You believe this will improve the safety of the surrounding businesses, with an estimated benefit of $2 per park attendee. What kind of externality is this? Why? o Question 3 Create a new graph illustrating the market for amusement park business for these two externalities together. Label the demand curve, the social-value curve, the market equilibrium level of output, and the final socially optimal level of output.  What is the per-unit amount when both externalities are considered?  Discuss both government and private solutions that would result in an socially optimal outcome.