Mathematics, 24.03.2020 03:23 elizaannettem4466
Researchers randomly divide participants into groups. Each group takes a different amount of omega-3 fatty acid supplements daily for a month. One group receives a placebo. The researchers measure the impact on cholesterol levels in the blood. What is the purpose of random assignment in this experiment?
a. To ensure that all people with high cholesterol have an equal chance of being selected for the study
b. To increase the accuracy of the research results and prevent skewness in the data
c. To produce treatment groups with similar characteristics
d. To control confounding
Answers: 2
Mathematics, 21.06.2019 14:30
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Mathematics, 21.06.2019 21:30
Data from 2005 for various age groups show that for each $100 increase in the median weekly income for whites, the median weekly income of blacks increases by $105. also, for workers of ages 25 to 54 the median weekly income for whites was $676 and for blacks was $527. (a) let w represent the median weekly income for whites and b the median weekly income for blacks, and write the equation of the line that gives b as a linear function of w. b = (b) when the median weekly income for whites is $760, what does the equation in (a) predict for the median weekly income for blacks?
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Mathematics, 22.06.2019 00:20
Which of the following is equal to the square root of the cube root of 5 ? (1 point) 5 to the power of 1 over 3 5 to the power of 1 over 6 5 to the power of 2 over 3 5 to the power of 3 over 2
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Researchers randomly divide participants into groups. Each group takes a different amount of omega-3...
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