Employer Swifty Cleaners employs many high school students after school hours and weekends to work the customer counter. During the busy holiday season Swifty cleaners has the high school workers working over 40 hours per week. However, it has come to the the students' attention that they are not receiving overtime pay when the regular full time employees who work a variety of cleaning and customer counter functions are receiving overtime pay when working over 40 hour per week. Is Employer Swifty required to pay these part time high school workers overtime in any particular week?
In: Operations Management
1) Should undocumented immigrants be afforded the right to health insurance and other benefits – discuss the legal environment and both merits and barriers to providing government health insurance.
2) Do a SWOT Analysis on the information below
We are opening a college Medical Center. Our center will focus on caring for the students of the College. Perhaps later on, we will be a community based medical center, but as we are new, we will start off by only servicing the needs of our College students.
Our services: Primary Medical Care
Hours: 9 AM to 5 PM Monday to Friday
Insurance: Oxford, Cigna, Cash
Languages: English & Spanish
In: Operations Management
A free-to-air TV news bulletin asked viewers to phone in their response to the question: “Is the Federal government doing enough about climate change?” Respondents dialled different numbers to register “yes” or “no” answers.
(a) Why would it be wrong for the TV station to interpret the results of the survey as an indication of “public opinion”? (b) Identify at least two sources of bias in this survey, explaining how the bias arises in each case. (c) Giving brief reasons in each case, indicate whether MAS183 students are likely to be representative of Murdoch University students in relation to – (i) their brand of mobile phone. (ii) attitudes to public policy on climate changeIn: Statistics and Probability
The expected distribution (from previous years) on an exam roughly follows a normal curve in which the highest scoring 2.5% of the students get As; the next highest scoring 14%, Bs; the next 67%, Cs; the next 14%, Ds; and the lowest 2.5%, Fs.
A class takes a test using a new grading system and 10 students get As, 34 get Bs, 140 get Cs, 10 get Ds, 6 get Fs. Can you conclude that the new system produces a different distribution of grades using .01 level?
Give: null, alternative, chi-square statistic, chi-square critical, decision, and conclusion.
In: Statistics and Probability
The following data are the monthly salaries y and the grade point averages x for students who obtained a bachelor's degree in business administration.
| GPA | Monthly Salary ($) |
| 2.7 | 3,600 |
| 3.5 | 3,800 |
| 3.6 | 4,200 |
| 3.2 | 3,700 |
| 3.4 | 4,200 |
| 2.8 | 2,400 |
The estimated regression equation for these data is y^ = -464.3
+ 1285.7x and MSE = 259,464
a. Develop a point estimate of the starting
salary for a student with a GPA of 3.0 (to 1 decimal).
b. Develop a confidence interval for the mean starting salary for all students with a 3.0 GPA (to 2 decimals).
( , )
c. Develop a prediction interval for Ryan Dailey, a student with a GPA of 3.0 (to 2 decimals).
( , )
In: Statistics and Probability
The students in one college have the following rating system for
their professors:excellent, good, fair, and bad. In a recent poll
of the students, it was found that they believe that 20% of the
professors are excellent, 50% are good, 20% are fair, and 10% are
bad. Assume that 12 professors are randomly selected from the
college.
a. What is the probability that 6 are excellent, 4 are good, 1 is
fair, and 1 is bad?
b. What is the probability that 6 are excellent, 4 are good, and 2
are fair?
c. What is the probability that 6 are excellent and 6 are
good?
d. What is the probability that 4 are excellent and 3 are
good?
e. What is the probability that 4 are bad?
f. What is the probability that none is bad?
In: Statistics and Probability
Hypothesis Tests with Z-statistics
Students in a physics class have an average of 73 on exams with a standard deviation of 12. The teacher is testing a whether having open book exams will help her students get better scores. After 6 open book exams, her class has an average of 76.5 on the exams.
a. Who are the groups being compared/tested?
b. What are the null and research hypotheses?
c. what are the numbers needed for the z statistic?
d. What is the z statistic?
e. For a two tailed test at .05 significance, the critical area is
+/- 1.96. What decision do we make?
In: Statistics and Probability
Students in a seventh-grade class were given an exam. During the next 2 years, the same students were retested several times. The average score g can be approximated by the model
g(t) = 81 − 13 log10(t + 1), 0 ≤ t ≤ 24
where t is the time (in months).
(a) What was the average score on the original exam? ???
(b) What was the average score after 6 months? (Round your answer
to one decimal place.) ???
(c) When did the average score drop below 70? (Round your answer to
the nearest month.)
The average score dropped below 70 after ??? months.
In: Math
1.Sixteen students choose exactly one snack each from three different snacks offered after class. On a given day, what is the probability that 8 students choose fruit, 5 choose yogurt and the rest choose power bars?
2. A book shelf has nine books. Five of the books have identical red covers and four have identical white covers.
a. In how many ways can 3 red and 3 white books be chosen from the nine books?
b. You select 4 books from the shelf. What is the probability of selecting exactly 4 books of the same color?
In: Statistics and Probability
For which of the following scenarios would it be appropriate to use a one-sample z-test?
A. Comparing the average weight of newborns in Hospital A to the average weight of newborns in Hospital B
B. Comparing the political affiliation of ASU students against the political affiliation of all college students
C. Comparing the number of packs of cigarettes smoked per day by residents of urban areas with the number of cigarettes smoked per day by all persons in the USA
D. All of the above
E. Comparing the results of Likert scale patient satisfaction scores of patients at the VA against the Likert scale patient satisfaction scores of the overall population of patients
In: Statistics and Probability