Q8. A researcher wants to study the effectiveness of a pill intended to reduce stomach heartburn in pregnantwomen. The researcher chooses randomly 400 women to participate in this experiment for 9 months of theirpregnancy period. They all need to have the same diet. The researcher designs two groups of 200 participants:One group take the real medication intended to reduce heartburn, while the other group take placebomedication. In this study what are:Independent variable:Dependent variable:Control variable:Experimental group: "Control group:If the participants do not know who is consuming the real pills and who is consuming the sugar pills.This study isIt happens that 40% of the participants do not find the treatment helpful and drop out after 6 months.The researcher throws out the data from subjects that drop out. What type of bias is there in this study?If the company who makes the medication funds this research, what type of bias might exist in thisresearch work?

conclusion:The aim of this study is to determine if a pill effectively alleviates heartburn in…

Answered: Q8. A researcher wants to study the…

Biology: The Dynamic Science (MindTap Course List)

4th Edition

ISBN:9781305389892

Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Chapter20: Development Of Evolutionary Thinking

Section: Chapter Questions

Problem 12TYK

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Similar questions

Which of the following questions best exemplifies basic research? a. How did life begin? b. How does alcohol intake affect aging? c. How fast does H1N1 flu spread among humans? d. How can we reduce hereditary problems in purebred dogs? e. How does the consumption of soft drinks promote obesity?
Discuss Concepts Many city-dwellers have noted that the density of cockroaches in apartment kitchens appears to vary with the habits of the occupants: people who wrap food carefully and clean their kitchen frequently tend to have fewer arthropod roommates than those who leave food on kitchen counters and clean less often. Interpret these observations from the viewpoint of a population ecologist.
Ideally, an experimental group differs from a control group (a) only with respect to the hypothesis being tested (b) because its subjects are more reliable (c) in that it is less subject to bias (d) in that it is less vulnerable to sampling error (e) only with respect to the variable being studied
Apply Evolutionary Thinking When a biologist first tested a new pesticide on a population of insects, she found that only 1% of the insects survived their exposure to the poison. She allowed the survivors to reproduce and discovered that 10% of the offspring survived exposure to the same concentration of pesticide. One generation later, 50% of the insects survived this experimental treatment. What is a likely explanation for the increasing survival rate of these insects over time?
The training of animals usually involves ______________ ___________ . imprinting classical conditioning operant conditioning cognitive learning
Which of the following statements does not support the conclusion that giraffes are k-selected species? Giraffes are approximately 6' tall and weigh 150 Ibs at birth Wild giraffes begin mating at 6-7 years of age Newborn giraffes are capable of coordinated walking within an hour of birth, and running within 24 hours of birth Giraffes rarely give birth to twins.
In one survey, fifteen randomly selected students were found to be taller than 6 feet. This data led to the conclusion that the average height of a student is greater than 6 feet. This is an example of __________. a. experimental error b. sampling error c. a subjective opinion d. experimental bias
The ability of rats to learn how to run a maze is an example of._______ imprinting classical conditioning operant conditioning cognitive learning
Which of the following represents the application of the scientific method? a. comparing one experimental subject to one control subject b. believing an explanation that is too complex to be tested c. using controlled experiments to test falsifiable hypotheses d. developing one testable hypothesis to explain a natural phenomenon e. observing a once-in-a-lifetime event under natural conditions
Birth Defects and Multiple Births A woman who carries multiple offspring at the same time increases the risk of some birth defects. FIGURE 42.18 shows the results of Yiwei Tang's study of birth defects reported in Florida from 1W6 to 2000. Tang compared the incidence of various defects among single and multiple births. She calculated the relative risk for each type of defect based on type of birth, and corrected for other differences that might increase risk such as maternal age, income, race, and medical care during pregnancy. A relative risk of less than 1 means that multiple births pose less risk of that defect occurring. A relative risk greater than 1 means multiples are more likely to have a defect. FIGURE 42.18 Prevalence, per 10,000 live births, of various types of birth defects among multiple aria single births. Relative risk for each defect is given after researches adjusted for the motor's age, race, previous adverse pregnancy experience, education, Medicaid participation during pregnancy, as well as the infant's sex and number of siblings. 4. Does a multiple pregnancy increase the relative risk of chromosomal defects in offspring?
When researchers say that a scientific hypothesis must be falsifiable, they mean that: a. the hypothesis must be proved correct before it is accepted astruth. b. the hypothesis has already withstood many experimentaltests. c. they have an idea about what will happen to one variable ifanother variable changes. d. appropriate data can prove without question that thehypothesis is correct. e. if the hypothesis is wrong, scientists must be able todemonstrate that it is wrong.
What is assortative mating? when individuals mate with those who are similar to themselves when individuals mate with those who are dissimilar to themselves when individuals mate with those who are the most fit in the population when individuals mate with those who are least fit in the population

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