What is Life? A Guide to Biology 3e & LaunchPad for Phelan's What is Life? (Six Month Access) 3e
3rd Edition
ISBN: 9781319028503
Author: Jay Phelan
Publisher: W.H. Freeman & Co
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Question
Chapter 1, Problem 10MC
Summary Introduction
Introduction:
Variables are the various conditions that are present in a study (such as the treatment given).
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Compare and contrast random and systematic experimental errors with specific examples either real or fictitious. Explain how these types of errors can be identified and reduced in an experiment.
I answered with a and c but keep getting told its the wrong answer.
Which of the following is not a component of effective experimental designs in the early stages of a scientific study?
Select one or more:
a. small sample sizes
b. experimental groups taking a placebo
c. double blind experiments
d. short duration
e. animal models
f. repetitive testing
The following are reasons why randomized control trials (RCTs) are not used to investigate all research questions, except:
a.
RCTs can be expensive, which can make it difficult if funding is limited
b.
RCTs can be time-consuming, and it may take months and sometimes years to obtain final results
c.
For certain research questions and/or certain types of exposure variables, it may not be ethical to conduct an RCT
d.
RCTs are less valid than observational analytical study designs
Chapter 1 Solutions
What is Life? A Guide to Biology 3e & LaunchPad for Phelan's What is Life? (Six Month Access) 3e
Ch. 1 - Prob. 1SACh. 1 - Prob. 2SACh. 1 - Prob. 3SACh. 1 - Prob. 4SACh. 1 - Prob. 5SACh. 1 - Prob. 6SACh. 1 - Prob. 7SACh. 1 - Prob. 8SACh. 1 - Prob. 9SACh. 1 - Prob. 10SA
Ch. 1 - Prob. 11SACh. 1 - Prob. 12SACh. 1 - Prob. 13SACh. 1 - Prob. 14SACh. 1 - Prob. 15SACh. 1 - Prob. 16SACh. 1 - Prob. 17SACh. 1 - Prob. 18SACh. 1 - Prob. 1MCCh. 1 - Prob. 2MCCh. 1 - Prob. 3MCCh. 1 - Prob. 4MCCh. 1 - Prob. 5MCCh. 1 - Prob. 6MCCh. 1 - Prob. 7MCCh. 1 - Prob. 8MCCh. 1 - Prob. 9MCCh. 1 - Prob. 10MCCh. 1 - Prob. 11MCCh. 1 - Prob. 12MCCh. 1 - Prob. 13MCCh. 1 - Prob. 14MCCh. 1 - Prob. 15MCCh. 1 - Prob. 16MCCh. 1 - Prob. 17MC
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- The legend from figure 1 includes all of the following information EXCEPT: a. the error bars represent the standard error b. the number of replicates (n) c. a brief explanation of the experiment design d. which pH level caused the greatest delay in egg laying egg laying time (h) 56- 54- 52- 50- 55 54 54 3.13 3.33 4.33 53 5.33 52 6.33 53 7.33 53.7 54 8.33 9.33 53.3 10.33 54 11.33 pH FIGURE 1 | Egg laying time in different pH environments. Thirty-five newly hatched L1 were cultured at specific pH medium. The earliest observed egg laying time on each plate was recorded. Error bars represent the standard error from three replicated experiments.arrow_forwardWrite a summary: Simply put, a lab report is a way to explain what you have done in an experiment. You describe theresults you obtained and then discuss what you learned. There are several ways to write a lab report,and depending on your class or your instructor, the requirements will vary. But this guide is to helpyou understand the reason why writing a lab report is an important part of the science process. It willalso introduce the basic structure of one type of write-up.In college, any science course you take will require you to do a lab report. But they are not just busywork. They actually serve a purpose. You see, a written report is one of the main ways to share information to other scientists. It communicates the major points of an investigation to others who are ina similar field. This is a systematic way to spread information!Lab reports have their own unique style and format, too. Though you may have been taught to writepoetically and with artistry, lab reports require…arrow_forwardA properly designed experiment contains the following: positive and negative controls and experimental conditions. positive control and experimental conditions. positive and negative controls control and experimentalarrow_forward
- I checked all the boxes for my answer and apparently that's incorrect?arrow_forwardIn regard to the difference margin (M), which of the following statements is NOT right? a. the difference margin should be chosen before the start of a trial b. the difference margin is a value randomly chosen by the researchers c. the difference margin is carefully chosen with both statistical and clinical considerations d. Non-inferiority and equivalence in efficacy between a new treatment and the standard treatment should be claimed in the presence of a well justified difference marginarrow_forwardWhat is control group? Explain the purpose of a control in an experiment.arrow_forward
- What is the purpose of positive and negative controls in an experiment?arrow_forwardNanotechnology can provide alternatives to early detection of cancer cells, drug delivery, and injectable vaccines that to this day rely on healthcare professionals to administer. What are the benefits and cost of it? Which do you think is more equitable in its impact? (benefit or cost) Why?arrow_forwardWhat is the purpose of randomization in a randomized controlled trial? a. To ensure that there are fewer adverse effects b. To ensure that participants are unaware as to whether they are receiving the medicine or the placebo c. To ensure that participants in the treatment group and those in the pacebo (or control) group are as similar as possible when the study begins d. To ensure that participants in the trial are representative of the target populationarrow_forward
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