Recall again that Rind & Bordia (1996) investigated whether
or not drawing a happy face
on customers’ checks increased the amount of tips received by a
waitress at an upscale
restaurant on a university campus. During the lunch hour a waitress
drew a happy,
smiling face on the checks of a random half of her customers. The
remaining half of the
customers received a check with no drawing (18 points).
The tip percentages for the control group (no happy face) are as
follows:
45% 39% 36% 34% 34% 33% 31% 31% 30% 30% 28%
28% 28% 27% 27% 25% 23% 22% 21% 21% 20% 18%
8%
The tip percentages for the experimental group (happy face) are as
follows:
72% 65% 47% 44% 41% 40% 34% 33% 33% 30% 29%
28% 27% 27% 25% 24% 24% 23% 22% 21% 21% 17%
This time, you are to perform a “hypothesis test” using the tip
data, answering each of
the questions below. For short-answer questions, be brief. However,
you must give
enough detail to justify your answers. Single-sentence responses
will generally not
suffice, but do not exceed a paragraph for any given answer.
o. Considering both the probability value and effect size
measure, what
interpretations would you make about the findings? That is, what
are your
conclusions about the effects of leaving happy faces on checks?
In: Statistics and Probability
The age distribution of the Canadian population and the age distribution of a random sample of 455 residents in the Indian community of a village are shown below.
| Age (years) | Percent of Canadian Population | Observed
Number in the Village |
| Under 5 | 7.2% | 52 |
| 5 to 14 | 13.6% | 80 |
| 15 to 64 | 67.1% | 281 |
| 65 and older | 12.1% | 42 |
Use a 5% level of significance to test the claim that the age distribution of the general Canadian population fits the age distribution of the residents of Red Lake Village.
(a) Find the value of the chi-square statistic for the sample.
(Round your answer to three decimal places.)
In: Statistics and Probability
Write, test, and debug (if necessary) JavaScript scripts for the following problem. You must write the HTML file that references the JavaScript file.
Use prompt to collect names of persons from the user. When the user enters ‘DONE’, your script should stop collecting more names. Then, it should ask the user to specify the following style properties:
Border size? 2px, 5px, or 8px.
Border Color? blue, red, green, and black.
Border style? solid, dotted, dashed, and double.
The HTML document should display the person names in a table using
the style properties specified by the user.
In: Computer Science
The CDC is proposing to train public health professionals nationally on improving Influenza A prevention strategies targeting particular high-risk groups in the state. In order to prepare for next year's flu season, the CDC needs to identify the locations where possible mass vaccination clinics need to be set up.
You are the head of a nine-member public health committee at the state public health department. You need to present the proposed data analysis design to the public health department chair. Your proposed data analysis design should include the following:
A proposal for the research design.
A sample, methods, and data analysis strategy that you would use for this study.
Specifics of your research.
Updated estimates on the number of influenza cases and related hospitalizations and deaths in your state in the previous years.
An analysis of data by geographical area.
An analysis of data by demographics.
Key flu indicators and their prevalence in your state.
Recommendations on the locations of future clinics.
In: Nursing
you will propose a hypothesis test that will test a
claim that is of interest to you in the business world. Then
describe how you would gather a representative sample to test that
claim.
1. state the claim you wish to investigate in your own words.
2. write a null and alternative hypothesis.
3. describe how you will gather a representative sample to test
your claim.
4. state the type of test you would use for example,
TTest,1PropZTest, etc.
In: Statistics and Probability
Describe a project that you worked on, either personally or professionally, that was hampered by communication difficulties and interpersonal challenges. Based on what you have learned about emotional intelligence and cultural and generational awareness, what recommendations would you make to improve interpersonal and team dynamics? Explain the rationale behind your recommendations.
In: Operations Management
Describe a project that you worked on, either personally or professionally, that was hampered by communication difficulties and interpersonal challenges.
Based on what you have learned about emotional intelligence and cultural and generational awareness, what recommendations would you make to improve interpersonal and team dynamics? Explain the rationale behind your recommendations.
In: Operations Management
discuss the importance of being aware of your own motivation style and outline what types of rewards would motivate you at work. use examples to further explain your answer
In: Operations Management
Discuss the importance of being aware of your own motivation style and outline what types of rewards would motivate you at work. Use examples to further explain your answer
In: Operations Management
In: Economics