In 500-600 words, examine the challenges researchers face in choosing their participants, their study population size,...

In 500-600 words, examine the challenges researchers face in choosing their participants, their study population size, and their sampling method. Why are generalizability, reliability, and validity important considerations when it comes to a researcher’s sampling method?

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orchestra answered 2 years ago

An investigator conducted a case-control study in 1000 participants (500 cases and 500 controls) to examine...

An investigator conducted a case-control study in 1000 participants (500 cases and 500 controls) to examine the association between childhood head trauma (exposure) and Parkinson’s disease(outcome). Information on head trauma was self-reported by study participants. Cases were able to correctly report exposure to head trauma 96% of the time, while controls correctly reported exposure to head trauma 80% of the time. Cases and controls correctly reported no exposure to head trauma 96% and 98% of the time, respectively. The truth(which...

What is a megacity? Identify and describe two challenges megacities face because of their population size?...

What is a megacity? Identify and describe two challenges megacities face because of their population size? Your response to this question should be in paragraph form, written in grammatically correct, and complete sentences. Use a word count of 200-250 words/a few paragraphs as a guide.

1. Researchers want to study the size of the local raccoon population. On one night, 25...

1. Researchers want to study the size of the local raccoon population. On one night, 25 animals were caught, tagged, and then released. Over the next several weeks, 3 samples of 15 were taken. The first time, 8 raccoons were tagged. The next time, 6 raccoons had tags. On the final time, 9 raccoons had tags. What would you report as the size of the raccoon population? 2. Research on a new medication shows it is 85% effective in relieving...

What are some challenges researchers and health professionals face communicating with the media?

Q1. What are the trends in the beverage industry (500-600 words)

what makes the participants of a study a good/bad sample of the population?

Ten participants were recruited for a study on the effect of target size on a psychomotor...

Ten participants were recruited for a study on the effect of target size on a psychomotor task. The researcher predicted that larger targets would result in faster psychomotor response. Five participants were randomly assigned to group 1 (large target size) and the other five were randomly assigned to group 2 (small target size). Data are below. Group 1: 9, 6,8,8,9 Group 2: 6,7,7,9,8 What is the obtained value of the most appropriate statistic? What is the critical value for this...

In a study to examine the effects of homeopathic treatment of wounds, researchers sutured a deep...

In a study to examine the effects of homeopathic treatment of wounds, researchers sutured a deep muscular incision on anesthetized rats and randomly assigned rats to 5 treatments: a placebo (sugar water), two homeopathic remedies (Arnica and Staphisagria) each administered at two levels of dilution. The treatments were consumed daily by the rats, and the time it took (in days) til healing was complete was measured for each (see columns healing time and treatment in your HW5b spreadsheet). Is there...

Explain the advantages and disadvantages of financial statements. (need 500-600 words)

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In 500-600 words, examine the challenges researchers face in choosing their participants, their study population size,...

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An investigator conducted a case-control study in 1000 participants (500 cases and 500 controls) to examine...

What is a megacity? Identify and describe two challenges megacities face because of their population size?...

1. Researchers want to study the size of the local raccoon population. On one night, 25...

What are some challenges researchers and health professionals face communicating with the media?

Q1. What are the trends in the beverage industry (500-600 words)

Q1. What are the trends in the beverage industry (500-600 words)

what makes the participants of a study a good/bad sample of the population?

Ten participants were recruited for a study on the effect of target size on a psychomotor...

In a study to examine the effects of homeopathic treatment of wounds, researchers sutured a deep...

Explain the advantages and disadvantages of financial statements. (need 500-600 words)