In December 2004, 44% of students in high school were satisfied with the lunches supplied through the school. In May 2010, an organization conducted a poll of 766 students in high school and asked if they were satisfied with the lunches supplied through the school. Of the 766 surveyed, 299 indicated they were satisfied. Does this suggest the proportion of students satisfied with the quality of lunches has decreased? (a) What does it mean to make a Type II error for this test? (b) If the researcher decides to test this hypothesis at the alpha=0.10 level of significance, compute the probability of making a Type II error, beta, if the true population proportion is 0.39. What is the power of the test? (c) Redo part (b) if the true population proportion is 0.43.
In: Statistics and Probability
Read pages 1 – 10 in the book by Kothari, C.R., (2004) Research Methodology: Methods and Techniques. Then answer the following three questions in your own words.
In: Economics
In December 2004, 54% of students in high school were satisfied with the lunches supplied through the school. In May 2010, an organization conducted a poll of 1045 students in high school and asked if they were satisfied with the lunches supplied through the school. Of the 1045 surveyed, 502 indicated they were satisfied. Does this suggest the proportion of students satisfied with the quality of lunches has decreased?
(a) What does it mean to make a Type II error for this test?
(b) If the researcher decides to test this hypothesis at the alpha equals 0.10 level of significance, compute the probability of making a Type II error, beta, if the true population proportion is 0.48. What is the power of the test?
(c) Redo part (b) if the true population proportion is 0.52.
In: Statistics and Probability
The dataset ToyotaCorolla.jmp contains data on used cars on sale during the late summer of 2004 in the Netherlands. It has 1436 records containing details on 38 attributes, including Price, Age, Kilometers, HP, and other specifications. (a.) Explore the data using the data visualization (e.g., Graph > Scatterplot Matrix and Graph > Graph Builder) capabilities of JMP. Which of the pairs among the variables seem to be correlated? (three or four correlations please).
Multivariate Correlations
|
Price |
Age_08_04 |
KM |
HP |
CC |
Quarterly_Tax |
Weight |
Guarantee_Period |
|
|
Price |
1.0000 |
-0.8766 |
-0.5700 |
0.3150 |
0.1264 |
0.2192 |
0.5812 |
0.1466 |
|
Age_08_04 |
-0.8766 |
1.0000 |
0.5057 |
-0.1566 |
-0.0981 |
-0.1984 |
-0.4703 |
-0.1526 |
|
KM |
-0.5700 |
0.5057 |
1.0000 |
-0.3335 |
0.1027 |
0.2782 |
-0.0286 |
-0.1389 |
|
HP |
0.3150 |
-0.1566 |
-0.3335 |
1.0000 |
0.0359 |
-0.2984 |
0.0896 |
0.0762 |
|
CC |
0.1264 |
-0.0981 |
0.1027 |
0.0359 |
1.0000 |
0.3070 |
0.3356 |
-0.0177 |
|
Quarterly_Tax |
0.2192 |
-0.1984 |
0.2782 |
-0.2984 |
0.3070 |
1.0000 |
0.6261 |
-0.1634 |
|
Weight |
0.5812 |
-0.4703 |
-0.0286 |
0.0896 |
0.3356 |
0.6261 |
1.0000 |
-0.0129 |
|
Guarantee_Period |
0.1466 |
-0.1526 |
-0.1389 |
0.0762 |
-0.0177 |
-0.1634 |
-0.0129 |
1.0000 |
In: Economics
In: Economics
According to a 2004 report by Roger Boe et. Al. of Correctional Service Canada, the mean length of a Canadian jail sentence in 2001/2002 was ? = 4.10 months with σ = 9.75 months.
a) Can we assume that prison sentences are normally distributed? Please explain.
b) Using the central limit theorem, what is the approximate probability that the mean sentence for a random sample of 225 prisoners is more than 4.75 months?
In: Statistics and Probability
The Sumatra-Andaman earthquake of December 26, 2004 with an undersea epicenter off the west coast of Sumatra, Indonesia, as reported in [1][2]. It triggered a series of devastating tsunamis that spread throughout the Indian Ocean killing approximately 230,000 people, including more than 168,000 in Indonesia and over 30,000 in Sri Lanka [2]. Sahana [2], a free and open source disaster management information system developed in Sri Lanka in the immediate aftermath of the Indian Ocean tsunami. Suppose that Sahana is addressing those recommendations and associated challenges from the Tsunami Evaluation Commission (TEC).
List out (4) factors when Sahana project did not maintenance software consistency and stability
In: Computer Science
The Sumatra-Andaman earthquake of December 26, 2004 with an undersea epicenter off the west coast of Sumatra, Indonesia, as reported in [1][2]. It triggered a series of devastating tsunamis that spread throughout the Indian Ocean killing approximately 230,000 people, including more than 168,000 in Indonesia and over 30,000 in Sri Lanka [2]. Sahana [2], a free and open source disaster management information system developed in Sri Lanka in the immediate aftermath of the Indian Ocean tsunami. Suppose that Sahana is addressing those recommendations and associated challenges from the Tsunami Evaluation Commission (TEC).
List out (4) factors of Sahana project security issue
In: Computer Science
The Study of Instructional Improvement (SII; Hill, Rowan, and Ball, 2004) was carried out by researchers at the University of Michigan to study the math achievement scores of first- and third-grade students in randomly selected classrooms from a national U.S. sample of elementary schools.
Using the information above answer the following question using excel and show work.
1.
Format:
A data frame with 1190 observations on the following 12 variables.
a. sex
: Indicator variable (0 = boys, 1 = girls)
b. minority
: Indicator variable (0 = non-minority students, 1 = minority students)
c. mathkind
: Student math score in the spring of their kindergarten year
d. mathgain
: Student gain in math achievement score from the spring of kindergarten to the spring of first grade (the dependent variable)
e. ses
: Student socioeconomic status
f. yearsteach
: First grade teacher years of teaching experience
In: Computer Science
Developing Job Descriptions for Red Lobster
Red Lobster operates over 670 casual-dining seafood restaurants in the US and Canada, employing more than 63,000 people. When Red Lobster developed a new business strategy to focus on value and improve its image, it established a new vision, mission, and goals for the company. The restaurant chain simplified its menu with the highest-quality seafood it could offer at mid-range prices, traded its restaurants’ tropical themes for a crisp, clean look with white-shirt-and-black-pants uniforms for its employees, and added Northeastern coastal imagery to its menu and Web-site. Executing the new mission and differentiation strategy required hiring fun, hospitality-minded people who shared its values.
Although Red Lobster had not had any problem with hiring restaurant managers, the company felt that the managers it hired did not always reflect Red Lobster’s strategy, vision, and values. The company feels that their old job descriptions do not convey the passion and creativity that the new strategy requires from its employees. They want their job descriptions to help bolster recruitment of the kind of managers that will help advance the mission and create restaurant environments where employees feel motivated and customers feel welcome upon entering the establishment and positive about their experience when they leave.
The Charge
You have been hired as a consultant to help Red Lobster recruit management level staff. They have asked you to design an overall strategy that will help create job descriptions to improve the fit between its new management hires and its new business strategy. Job descriptions should help convey the importance of the Restaurant Manager position within the company and also in the restaurant itself. The process you design will help them, later on, develop other restaurant job descriptions for the service-level staff.
Question
Draw up a job description for the Red Lobster Restaurant Manager position that includes, at a minimum, the following:
Job title
Overall purpose statement - overall description of the broad function and scope of the position
List of duties or tasks performed critical to success
Decision-making requirements
Description of the relationships and roles within the company, including supervisory positions, subordinating roles and other working relationships
List of minimum qualifications and what experience/competencies an ‘ideal candidate’ would possess.
In: Operations Management