1) μ: $3600 per student σ: $150 Distribution: Skewed to the left Draw a well-labeled picture of the relevant sampling distribution for this population data including its standardization (z), assuming the sample size is 1700 school districts.
2) On average college students are given homework 3 nights a week. The 95% Confidence Interval is reported as 2 to 6 nights. Answer the following true or false, and correct the “false” statements.
a. T F The width of a Confidence Interval depends on the sample size.
b. T F You can know for sure that this interval includes the true population
parameter.
c. T F This Confidence Interval is interpreted to mean that 95% percent of all 8th
graders in the district are given homework 2 to 6 nights a week.
d. T F The purpose of a Confidence Interval is to provide a range of values which are
thought to include the sample mean.
In: Statistics and Probability
A sports psychologist is part of a team of researchers collecting descriptive psychological, mental, performance and physiological data on male and female high school athletes. One of the variables is Intelligence Quotient (IQ) as assessed by the Stanford-Binet Intelligence Scale (5th Ed. 2003). A sample of athletes (n=61) provided the following statistics: mean±sX = 97±16. The parameter µ for IQ is thought to be 100. Test H0: X=µ at α=0.05÷2 (a 2-tailed test).
|
Step #1 – State H0: and HA: |
|
Step #2 – State the criterion for attaining statistical significance |
|
Step #3- Correct statistical procedure is a one-sample t-test |
|
Step #4 – Find the critical 2-tailed statistical value |
|
Step #5 – Draw the picture |
|
Step #6 Calculate the statistical value t=mean-μsXn |
|
Step #7 – Statistical Decision |
|
Step #8 - Conclusion |
In: Statistics and Probability
Ted Bundy was a serial killer that was active from 1974-1978. He
confessed to approximately 30 murders although the actual toll is
unknown. Bundy targeted woman and was involved in kidnapping, rape,
murder and necrophilia. He completed law school, worked on
political campaigns, and outwardly appeared to many to be “normal”.
When we thinking about profiling, can we see the signs for a future
serial killer? This week, we’ll explore the best ways
to react to serial killers. Address the following prompts:
• What is criminal profiling? How was it used in the
Bundy case?
• Discuss a few problems with profiling serial killers.
Why are they hard to identify?
• We see that they are many crimes that go unsolved
(some suspected to be the work of serial killers). What challenges
might investigators face in finding who committed a crime?
• What are some treatment options for serial killers?
In your opinion, do they work?
(http://www.ncbi.nlm.nih.gov/pubmed/12613432)
In: Psychology
In: Statistics and Probability
One of the most successful attacks against wireless networks (WLAN) is the Evil Twin attack. The goal is to introduce an attacker-controlled wireless access point near the “known good” WLAN network. This access point will advertise the exact same SSID as the authorized WLAN. Wireless users may accidently connect to this malicious access point thinking it is part of their authorized network. Once the connection is established, the attacker can initiate a man-in-the-middle attack and capture or relay traffic while eavesdropping on the entire communication.
Explain the potential risk an Evil Twin attack like this this would present, not in theory, but to your own organization (company, school, etc.) and how you would go about setting up an Evil Twin attack if you were an attacker. Detail the goals, tools, process, and methodology. Use whatever research will assist you. Provide screenshots if possible to demonstrate what you are doing. They can be third party
In: Computer Science
Matthew Damon has been appointed as a junior auditor of AwesomewaterhouseCoopers (AwC). One of his first tasks is to review the firm’s audit clients to ensure that independence requirements of APES 110 (Code of Ethics for Professional Accountants) are being met. His review has revealed the following:
(1) Jessica Parker is an assurance manager with AwC and it has just been decided to allocate her to the audit of Fresh Foods Limited (FFL). Jessica’s financially dependent daughter, Sarah, who is still in high school has recently used all her inheritance from her grandfather to buy a small parcel of shares in FFL.
Required:
Using the conceptual framework in APES 110 (Code of Ethics for Professional Accountants), identify potential threat(s) to independence & recommend safeguards (if any) to reduce the independence threat(s) identified. Also, provide an objective assessment of whether audit independence can be achieved.
In: Accounting
Employees who receive a bi-weekly paycheck get paid __________ times per year.
| a. |
12 |
|
| b. |
24 |
|
| c. |
26 |
|
| d. |
52 |
You are the manager of Drive Thru Burger. You had only one applicant for the position of cashier during your daily dinner rush. However, Ms. Betty, who applied, is a retired elementary school crossing guard in her late 70's and you are afraid that she will not be able to efficiently move customers through the line during dinner rush. What legal precedent must you defer to?
| a. |
1990 Americans with Disabilities Act |
|
| b. |
1972 Civil Rights Act |
|
| c. |
1978 Age Discrimination Act |
|
| d. |
Retired Teachers Union By-Laws |
Entry level employees are typically non-exempt, and are compensated based upon a(n) __________ wage. a. hourly b. annual c. minimum d. maximum
In: Operations Management
4. Indicate which variable is the independent and dependent for each pair. If either could be the independent, answer “reciprocal.” If the two variables do not seem related, answer “unrelated.”
a) Property inspections completed, number of inspectors
b) Property tax rate, property value
c) Consumption of ice cream in a month, average daily temperature in a month
d) Satisfaction with local services, voting in a local election
e) Work commute time, time of day
f) Merit pay, work productivity
g) Flu cases per capita, average age of population
h) Road miles constructed, number of commuters
i) Husband’s income, wife’s income
j) Visitors to a state park, visitors to a nearby national park
k) Season of the year, number of animals dropped at a shelter
l) Drop-out rate from high school, teenage pregnancy rate
m) Donations to a local ballet, Sales tax rate
In: Math
Headquartered in Plainfield, Indiana is the Chimney Safety Institute of America which, among other things, certifies Chimney Sweeps. There are three steps to becoming certified: purchase (and study) $515 of books, attend an in-person or online review or six-day training school (each of which is several hundred to over a thousand dollars), and pass an exam (again, a few hundred dollars). After this, there is an annual $229 certification fee. The website says that being certified proves “you’re one of the best,” and that certification “is the measure of a chimney sweep’s knowledge about the evaluation and maintenance of chimney and venting systems.” Presumably, the CSIA would argue that its certification protects consumers; given the information presented this week, aside from ensuring high quality chimney sweeps, why else might existing chimney sweeps find it in their interest to protect the certification system? What side effects might the (one-time and annual) fees, training, and exam introduce into the chimney sweep market?
In: Economics
1.
For safety reasons, 3 different alarm systems were installed in the vault containing the safety deposit boxes at a Beverly Hills bank. Each of the 3 systems detects theft with a probability of 0.82 independently of the others. The bank, obviously, is interested in the probability that when a theft occurs,at least one of the 3 systems will detect it. What is the probability that when a theft occurs, at least oneof the 3 systems will detect it? Your answer should be rounded to 5 decimal places.
2.
An engineering school reports that 58% of its students were male (M), 39% of its students were between the ages of 18 and 20 (A), and that 32% were both male and between the ages of 18 and 20.
What is the probability of choosing a random student who is a female or between the ages of 18 and 20? Assume P(F) = P(not M).
Your answer should be given to two decimal places.
In: Math