Identifying appropriate data sources to answer demographic information questions is challenging. While the widespread availability of existing data provides an opportunity for answering demographic information questions without the high expense associated with primary data collection, the data source must be chosen carefully to ensure that it can address the study question, that it has a sufficient number of observations, that key variables are available, there is an adequate confounder control and a sufficient length of the follow-up.
Primary data are collected expressly for research. Observational studies, meaning studies with no dictated intervention, require the collection of new data if there is no adequate existing data for testing
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Social media data provide real-time updates on users. Both the population and individual-level scale of these data creates the opportunity to study census that is difficult to assess through traditional means of data collection. And, compared to surveys and other traditional means of data collection, these data are low cost and the process of data collection can be automated. However, there are some limitations regarding the use of these data. For example, similar to traditional data streams, social media data are not always representative of the population of interest. While researchers have proposed methods for minimizing this limitation such as probabilistically adjusting the data to match the population under study - identifying and quantifying Big Data bias is challenging. This is partly due to a lack of demographic indicators such as age, race, and gender. The ability to accurately and reliably detect users’ demographic traits would expand the use of social media as a research tool for social and behavioral sciences and public health. Additionally, linking demographic information to social media data would allow researchers to study disparities and trends in health-related attitudes and
Secondary research is done to research the data collection through the study of information which has already being researched from the hospital websites, articles, discharge and intake records or through primary research.
This report will be about my chosen business Tesco. I will talk about the recruiting and selection process of Tesco. I chose Tesco because Tesco is one of the biggest supermarkets and they exist long time ago and they have been successful. Tesco has more than 250 employees so it is counted as a large business. Tesco was found in 1919 by Jack Cohen. Tesco on his first day made profit £1 from sales £4. Tesco’s brand appeared in 1924. Tesco has also bank, insurance company and petrol stations. Tesco have 476 000 employees so it is large business because is also international business. Tesco is a PLC company which means they are public limited company (they can sell shares to the public) and they have unlimited liabilities.
For the pass this assignment will describe the investigations that are carried out to enable the diagnosis of these physiological disorders. For the merit this assignment will assess possible difficulties involved in the diagnosis from their signs and symptoms.
Different care strategies can be used to support a person that has MS and type 1 diabetes
As a new recruit working in a public service you have been asked to investigate the response to emergency service incidents.
Answer: As we know, we can calculate the period, if the frequency of the signal is given by the formula
Explains to students that learning the metric system can be tricky but that a handy dandy reference tool can make memorizing and converting metric operations quite a bit easier. Explain to the that the whole class will get to make a metric tablet which has all of the metric labels and conversion so they can refer to it as they do their homework throughout the year.
e starting this project, I was a little unsure about how it was going to go and if the interview was going to be awkward. In my opinion, I knew my aunt was a survivor, but I wasn’t sure if other people were going to agree with me. “Are you ready?” I asked my aunt, Frances, as I got my questions organized. “Ya,” my aunt said “this will be fun!” Knowing she was excited about this project made it much easier for me.
How do reading specialist work with their district to choose assessments that align with curriculum to help inform instruction?
The Panel Designer is used to create graphic panels. I used these panels to change the values of discrete and continuous environment variables interactively during the simulation. From the Toolbox and the Symbol Explorer I placed controls and symbols via drag and drop on an open panel. The properties of the selected objects are displayed in a table format which I synchronized with the signal being depicted by the control. This division of all these windows makes the process to configure the panel and its controls virtually dialog-free. A brief description of them are as follows.
Q.11) “The Model of the Sun” is a theoretical description of the Sun’s interior derived from calculations based on the laws of physics. It also explains how the energy from nuclear fusion in the Sun’s core gets to its photosphere. (DTU 10ED Page 329)
In Unit 1, many topics and concepts about motion were covered. We started out with the basic ideas of motion into much harder ideas. Before that though, we learned how to read graphs to determine their mathematical expression and the keywords needed to understand motion. Such words includes position, velocity, acceleration, displacement, speed, instantaneous velocity, etc. Building off of that idea, we went on learning how to draw and describe acceleration arrows, motion maps, x, and v, and graphs based on the given scenario. Furthermore, we also learned how to calculate position and slope. We know that to calculate the position, the equation is position= (velocity) (time) + initial position and that the slope is the change in position over
Table 6.1.1 displays the matlab output of beta, standard error, t-statistic and p-value for the two independent variables during 10-year period. It is found that beta of X1 is 0.2750 which indicates there is a positive relationship between the utilities excess return and the healthcare excess return. This positive relationship is statistically significant as the p-value is close to 0 which is much less than the significance level of 5%. In addition, the standard error of X1 is 0.0300 which represents the average distance that the observed values fall from the regression line. This indicates that the model fits the data. In contrast, it is found that the material excess return is negatively
The use of secondary data sources adds another resource for public health practitioners in policy and intervention development. Instead of just using primary resources, secondary resources may be integrated to provide robust data collectively. Also, multiple data sources may be applied to gain a better understanding of the public health concern. Data sets available for mortality, morbidity, health outcomes, social and living environments can determine health needs and barriers to care. In situations where funding resources are a concern or limited, secondary data sources may be considered and applied in public health. If another agency has already collected the data, expenses are reduced and time is saved. However, categories and age groups may not be available for the question you have chosen.
Q1. (a) What is the difference between primary and secondary research? Under what circumstances might the availability of secondary data make primary research unnecessary?