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BTM8106 Week 1 Complete Solution use as a guide only.docx

by: Topseller Notetaker

BTM8106 Week 1 Complete Solution use as a guide only.docx PRG211

Marketplace > Ashford University > Computer Programming > PRG211 > BTM8106 Week 1 Complete Solution use as a guide only docx
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BTM8106 Week 1 Complete Solution use as a guide only.docx
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This 0 page Study Guide was uploaded by Topseller Notetaker on Friday November 13, 2015. The Study Guide belongs to PRG211 at Ashford University taught by in Fall 2015. Since its upload, it has received 23 views. For similar materials see in Computer Programming at Ashford University.

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Date Created: 11/13/15
1Jackson 2012 evennumbered Chapter Exercises p 244 You read in a health magazine about a study in which a new therapy technique for depression was examined A group of depressed individuals volunteered to participate in the study which lasted 9 months There were 50 participants at the beginning of the study and 29 at the end of the 9 months The researchers claimed that of those who completed the program 85 improved What possible confounds can you identify in this study What are internal validity and external validity and why are they so important to researcher Research has a bias since they are not taking into account the total number of participants They are not considering the complete sample It is important to have a complete validity of data for better analysis Complete analysis of sample needs to be taken into account Integrity in the field of academics is crucial not only inside the university but also for maintaining the level of trust in the minds of the people It is upto the researchers to maintain the integrity and the brand image of the university 2What is the purpose of conducting an experiment How does an experimental design accomplish its purpose Kant in 1793 proposes something that went on rampage and is now known worldwide The saying was Some things are ne in theory but do not work in practice This rule is applicable even after centuries Now people understand that theory and then application of the same in real like is not very easy Identifying something in theory is somewhat easy It just needs some logic and nothing else whereas application of the same in theory is very different When a person starts applying a theory into actual practice the real test starts and it is not very easy to pass through There will be many hurdles that a person needs to pass 3What are the advantages and disadvantages of an experimental design in an educational study Biggest advantage is related to the fact that the experimental design helps in analysing the difference between fact and the theory and the practical implementation of the same To describe the characteristics of relevant groups such as consumers salespeople organizations or market areas To estimate the percentage of units in a specified population exhibiting a certain behavior To determine the perceptions of product characteristics To determine the degree to Which marketing variables are associated To make specific predictions 4What is more important in an experimental study designing the study in order to make strong internal validity claims or strong external validity claims Why It is important to balance the two According to stats direct Internal validitv This is about the validity of results Within or internal to a study It usually concerns causality ie the strength of assigning causes to outcomes For laboratory experiments With tightly controlled conditions it is usually easy to achieve high internal validity For studies in difficult to control environments e g health services research it can be difficult to claim high internal validity When you claim high internal validity you are saying that in your study you can assign causes to effects unambiguously Randomisation is a powerful tool for increasing internal validity see confounding In the context of questionnaires the term criterion validity is used to mean the extent to which items on a questionnaire are actually measuring the realworld states or events that they are intended to measure This type of internal validity could be assessed by comparing questionnaire responses with objective measures of the states or events to which they refer for example comparing the selfreported amount of cigarette smoking with some objective measure such as cotinine levels in breath External validitV This is about the validity of applying your study conclusions outside or external to the setting of your study Another term for this is generalisability Sometimes this is obvious for example a public opinion poll taken at the entrance to a football match would not be properly representative of the general population Often it is less obvious for example a study in medical settings on a Monday morning will not be representative of the pattern of illnesses seen at other times of the week A key to improving external validity is to understand the setting thoroughly before you embark upon the study 5In an experiment What is a control What is the purpose of a control group Of single or multiple comparison groups Control means the level of significance an experiment Control group helps in comparing various groups in the experiment A single hypothesis is tried for rejecting or acceptance in the experiment 6What are confounds Give an example of a design that has three confounds Describe three ways to alter the design to address these confounds and explain the advantages and disadvantages of each Confounds means creating confusion in the experiment When irrelevant data is added into the relevant data confusion creeps into the experiment In the words of South Alabama university Potential confounding variables can be controlled for by using of one or more of a variety of techniques that eliminate the differential in uence an extraneous variable may have for the comparison groups in a research study 0 Differential in uence occurs When the in uence of an extraneous variable is different for the various comparison groups 0 For example if one group is mostly females and the other group is mostly males then the gender may have a differentially effect on the outcome As a result you Will not know Whether the outcome is due to the treatment or due to the effect of gender 0 If the comparison groups are the same on all extraneous variables at the start of the experiment then differential in uence is unlikely to occur o In experiments we want our groups to be the same or equivalent on all potentially confounding extraneous variables The control techniques are essentially attempts to make the groups similar or equivalent 7What does cause mean and why is it an important concept in research How are correlation and causation related A good hypothesis is a questions that would be answered with the data to be collected The goal is to develop a hypothesis that is practical and testable This the cause and the research try to prove it right or wrong 8You are a researcher interested in addressing the question does smiling cause mood to rise ie become more positive Sketch betweenparticipants withinparticipants and matched participants designs that address this question and discuss the advantages and disadvantages of each to yielding data that help you answer the question In between participants all the participants are researched and data is then compared In within subject repeated research and use of statistical tools is the norm In matched participants different participant in each group are researched Reference httpwwwablongmancomgraziano6etext siteMATERIALs gsgl 1suhtm


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