Recent orders

Quiz (Confidence Interval. Standard Error. t-statistic. z-statistic.)

  1. A sample of 49 sudden infant death syndrome (SIDS) cases had a mean birth weight of 2998 g. Based on other births in the county, we will assume σ = 800 g. Calculate the 95% confidence interval for the mean birth weight of SIDS cases in the county. Interpret your results.
  2. True or false? Given that a confidence interval for µ is 13 +
  • The value of 13 in this expression is the point estimate.
  • The value 5 in this expression is the estimate’s standard error.
  • The value 5 in this expression is the estimate’s margin of error.
  • The width of the confidence interval is 5.
  1. When do we use a t-statistic instead of a z-statistic to help infer a mean?
  2. Identify whether the studies described here are based on (1) single samples, (2) paired samples, or (3) independent samples.
  • Cardiovascular disease risk factors are compared in husbands and wives
  • A nutritional exam is applied to a random sample of individuals. Results are compared to the results of the whole nation.
  • An investigator compares vaccination histories in 30 autistic schoolchildren to a simple random sample of non-autistic children from the same school district.
  1. Identify two graphical methods that can be used to compare quantitative (continuous) data between two independent groups.
  2. A questionnaire measures an index of risk-taking behavior in respondents. Scores are standardized so that 100 represents the population average. The questionnaire is applied to a sample of teenage boys and girls. The data for boys is {72, 73, 86, 95, 95, 95, 96, 97, 99, 125}. The data for girls is {89, 92, 93, 98, 105, 106, 110, 126, 127, 130}. Explore the group differences with side-by-side boxplots. Create the boxplots and then describe how risk taking behavior varies between genders.
  3. Which study will require a larger sample size, one done with 80% power or 90% power when alpha (type I error) is set at 0.05 and we use the same population and expected difference and variation for both studies?
  4. True or False: When using data from the same sample, the 95% confidence interval for µ will always support the results from a 2-sided, 1 sample t-test.  Explain your reasoning.

E-cigarette usage. Why vape?

Instructions

According to the Centers for Disease Control and Prevention (2019), e-cigarette usage among middle and high school students increased 900% during 2011-2015.  In Utah, vape use is most popular with teens and young adults (Utah Department of Health, 2017).

For this research report, investigate the reasons why young people are attracted to the use of e-cigarettes.  Using valid and reliable resources, describe the overall factors leading to the use of e-cigarette devices.  Provide an overview of the potential risks for those who choose to vape.  Outline evidence-based practices for e-cigarette prevention.  Your paper should be approximately two pages in length and include in-text citations and a reference page.

All Assignments require APA formatting.

References

Centers for Disease Control and Prevention.  (2019).  Surgeon General’s Advisory on E-cigarette Use Among Youth.  Retrieved from:  https://www.cdc.gov/tobacco/basic_information/e-cigarettes/surgeon-general-advisory/index.html (Links to an external site.).

Utah Department of Health.  (2017).  Vaping Trends Among Utah Youth and Adults.  Retrieved from:  https://ibis.health.utah.gov/pdf/opha/publication/hsu/2017/1712_Vaping.pdf#HSU (Links to an external site.)

Engineering Research Project (Writing a Dissertation)

How to Write a Dissertation: Structure

Abstract – single page – 200-300 words

ØSummarises the main points of the dissertation, including its conclusions and findings

ØShould be written impersonally, concisely and be intelligible to non-experts who may be reading it out of context.

Øshould be informative and tell the reader what the research is about, how it was undertaken and what was discovered but not how the dissertation has been organised.

Dissertation– Structure

A typical example of a thesis structure and sequence is

ØChapter 1 – Introduction

ØChapter 2 – Literature review

ØChapter 3 – Methodology

ØChapter 4 – Results and Discussion

ØChapter 5 – Conclusions and      Recommendations

ØReferences

ØAppendices

Literature review 

ØShould review recent, relevant literature and be written in a critical and analytical manner.

ØShould not be a purely narrative account of what is contained in other published material

ØShould not try to produce a comprehensive review of all that has been published.

ØShould try to produce a structured, focused piece of writing which identifies and evaluates issues related to the project anandd raised by other authors.

ØIt should identify any gaps or disagreements about issues related to the project area.

ØThe literature review must not contain unacknowledged, copied, or closely paraphrased material.

ØA well written literature review would enable the aims and objectives of your study to be clearly identified by the reader.

Methodology

ØThe chapter should describe and justify in detail the procedures used in undertaking any data collection (method used).

ØFor experimental research it should also outline details of the materials and equipment used.

ØProvide details of the research process so that other would be able to reproduce your research using just this text.

Results and Discussion

ØThis chapter should present the collected data and describe the results.

ØResults can be presented as a series of tables and/or graphs using descriptive statistics.

ØTables and Graphs

ØProvide titles for tables and figures

ØPlace title above table and below figure

ØCan use table and figure numbers to reflect chapter, e.g. Table 3.1, Figure 3.2.

ØPresent any results of Parametric and/or Non-Parametric statistical analysis of your quantitative or qualitative results.

Provide critical discussion of any analysis of the results and the implications of the findings of the study in terms of the literature reviewed

Conclusions

ØThis chapter draws the findings from your study together and present them in a structured manner that allows the reader to see you have addressed the aims and objectives.

ØAlso can provide any recommendation for further work related to and as a result of your work.

References

ØThis section contains a list in alphabetical order of all the published sources that you have referred to in your work

Appendices

ØThis section(s) should include any other significant material that you have made reference to in the main body of your text

ØExample:

Øcopies of any questionnaires used for piloting and data collection,

Øinterview /topic schedules,

Øletters/

Øacknowledgements from respondents or interviewees,

Øsummaries of data analysis