A scientist has noted a possible relationship between a certain chemical substance found in fish and...
A scientist has noted a possible relationship between a certain chemical substance found in fish and the occurance of kidney failure in human. Which of the following preliminary steps should the scientist take before conducting a controlled expirement?
Homework Answers
Before conducting an experiment, the scientist has to analyze the cause and effect relationship between the chemical substance and the outcome. Establishing a cause and effect relationship helps to know the relation between the cause and effect of the outcome. Because wherever the cause is present, the effect must be there. There is no effect without a cause. A cause is an event which effects on another event. Here, the chemical substance found in the fish is the cause and the occurrence of kidney failure in the human who intakes this chemical substance is the effect.
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A scientist has noted a possible relationship between
a certain chemical substance found in fish and...
is it "B" correct answer? please elaborate. Thank you! 20. A scientist has noted a possible...
is it "B" correct answer? please elaborate.
Thank you!
20. A scientist has noted a possible relationship between a certain chemical substance found in fish and the occurrence of kidney failure in humans. Which of the following preliminary steps should the scientist take before conducting a controlled experiment? A. Establish a cause and effect relationship between the substance and the outcome. B. Review the literature to determine what other research is available on this topic. C. Write a research grant...
Which of the following studies illustrates an experimental design? A scientist found a relationship between people's...
Which of the following studies illustrates an experimental design? A scientist found a relationship between people's reported daily stress and life satisfaction A psychologist reported that people who voted in the last election felt more optimistic than those who did not. A therapist concludes couples told to write down positive things about their partners were happier than those told to write down negative things, A researcher measured how much alcohol students drank on the weekend and their GPA for the...
A conducting sphere with radius R has total charge Q. (a) Find the relationship between the...
A conducting sphere with radius R has total charge Q. (a) Find the relationship between the magnitude of the electric field and the electric potential on the surface of the conducting sphere. (Use the following as necessary R, Q, and E for the magnitude of the electric field.) V = (b) For a sphere of radius 77 cm, calculate the maximum surface electric potential at which the surrounding air begins to break down. Take the dielectric strength of (maximum sustainable...
study of 360 women who lived in certain country found that there was roughly a linear relationship between y= life-leng...
study of 360 women who lived in certain country found that there was roughly a linear relationship between y= life-length (in years) and x = number of sons the woman had, with a slope estimate of -0.83 (se 0.48). Answer parts a-c. Interpret the sign of the slope. Is the effect of having more boys good, or bad? O A. The positive sign of the slope indicates that as the number of boys increases, the life-length increases, so having more...
b) Electrochemistry is the branch of physical chemistry that studies the relationship between electricity, as a...
b) Electrochemistry is the branch of physical chemistry that
studies the relationship between electricity, as a measurable and
quantitative phenomenon, and identifiable chemical change, with
either electricity considered an outcome of a particular chemical
change or vice versa. These reactions involve electric charges
moving between electrodes and an electrolyte (or ionic species in a
solution). Thus electrochemistry deals with the interaction between
electrical energy and chemical change. When a chemical reaction is
caused by an externally supplied current, as in...
1. 2. 3. 4. 5. 6. 7. Shawna reads a scatterplot that displays the relationship between...
1.
2.
3.
4.
5.
6.
7.
Shawna reads a scatterplot that displays the relationship between the number of cars owned per household and the average number of citizens who have health insurance in neighborhoods across the country. The plot shows a strong positive correlation. Shawna recalls that correlation does not imply causation. In this example, Shawna sees that increasing the number of cars per household would not cause members of her community to purchase health insurance. Identify the lurking...
In Problem 6 you found a confidence interval for the difference from previously gathered data. In...
In Problem 6 you found a confidence interval for the difference from previously gathered data. In this problem you want to set the sample size for the two groups before conducting the study This will often be the case for clinical data where you want to make sure that, if a particular difference in two groups of the amount or level of a substance exists, your test will come back saying that such a difference exists. In other words, you...
1. Which of the following are the sites within the human body where carbon dioxide and...
1. Which of the following are the sites within the human body where carbon dioxide and oxygen are exchanged? A. Alveoli B. Arteries C. Synapses D. Venules 2. Which of the following describes the most important reason for repeating an experimental investigation? A. To verify the validity of the original findings B. To expand upon the original investigation C. To manipulate the independent variable D. To attempt to disprove the hypothesis 3. Lithium has an atomic number of 3 and...
Questions points Answer the following questions: An entrepreneurial scientist has invented a supplement that she believes...
Questions points Answer the following questions: An entrepreneurial scientist has invented a supplement that she believes can enhance short-term memory. She conducts an experiment to test the effect of the supplement on 23 volunteers, 12 of whom are given a placebo and 11 of whom are given the supplement. In analyzing in her study, she obtains a p-value of 0.19. Which of the following is a reasonable interpretation of her results This proves that at most 19% of the time,...
Managers at the Turquoise Oasis Spa are interested in knowing whether there is a relationship between...
Managers at the Turquoise Oasis Spa are interested in knowing whether there is a relationship between the age of their clients and the amount of money they spend in the spa. Upon analyzing the data, they found a correlation coefficient of .672. Thus, the relationship between the two variables is _________. strong moderate weak very weak Calculating the correlation coefficient using the_________ function is useful to determine the type and strength of a relationship between two variables. CAUSATION COVARIANCES CORREL...
is it "B" correct answer? please elaborate.
Thank you!
20. A scientist has noted a possible relationship between a certain chemical substance found in fish and the occurrence of kidney failure in humans. Which of the following preliminary steps should the scientist take before conducting a controlled experiment? A. Establish a cause and effect relationship between the substance and the outcome. B. Review the literature to determine what other research is available on this topic. C. Write a research grant...
Which of the following studies illustrates an experimental design? A scientist found a relationship between people's reported daily stress and life satisfaction A psychologist reported that people who voted in the last election felt more optimistic than those who did not. A therapist concludes couples told to write down positive things about their partners were happier than those told to write down negative things, A researcher measured how much alcohol students drank on the weekend and their GPA for the...
A conducting sphere with radius R has total charge Q. (a) Find the relationship between the magnitude of the electric field and the electric potential on the surface of the conducting sphere. (Use the following as necessary R, Q, and E for the magnitude of the electric field.) V = (b) For a sphere of radius 77 cm, calculate the maximum surface electric potential at which the surrounding air begins to break down. Take the dielectric strength of (maximum sustainable...
study of 360 women who lived in certain country found that there was roughly a linear relationship between y= life-length (in years) and x = number of sons the woman had, with a slope estimate of -0.83 (se 0.48). Answer parts a-c. Interpret the sign of the slope. Is the effect of having more boys good, or bad? O A. The positive sign of the slope indicates that as the number of boys increases, the life-length increases, so having more...
b) Electrochemistry is the branch of physical chemistry that
studies the relationship between electricity, as a measurable and
quantitative phenomenon, and identifiable chemical change, with
either electricity considered an outcome of a particular chemical
change or vice versa. These reactions involve electric charges
moving between electrodes and an electrolyte (or ionic species in a
solution). Thus electrochemistry deals with the interaction between
electrical energy and chemical change. When a chemical reaction is
caused by an externally supplied current, as in...
1.
2.
3.
4.
5.
6.
7.
Shawna reads a scatterplot that displays the relationship between the number of cars owned per household and the average number of citizens who have health insurance in neighborhoods across the country. The plot shows a strong positive correlation. Shawna recalls that correlation does not imply causation. In this example, Shawna sees that increasing the number of cars per household would not cause members of her community to purchase health insurance. Identify the lurking...
In Problem 6 you found a confidence interval for the difference from previously gathered data. In this problem you want to set the sample size for the two groups before conducting the study This will often be the case for clinical data where you want to make sure that, if a particular difference in two groups of the amount or level of a substance exists, your test will come back saying that such a difference exists. In other words, you...
Questions points Answer the following questions: An entrepreneurial scientist has invented a supplement that she believes can enhance short-term memory. She conducts an experiment to test the effect of the supplement on 23 volunteers, 12 of whom are given a placebo and 11 of whom are given the supplement. In analyzing in her study, she obtains a p-value of 0.19. Which of the following is a reasonable interpretation of her results This proves that at most 19% of the time,...
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