A new cream was developed to reduce the irritation caused by poison ivy. To test the effectiveness, researchers placed an ad online asking for volunteers to participate in the study. One hundred subjects replied and were informed that one group would receive the new cream and the other would receive a Which of the following statements is true about the benefits of random assignment? The variability between each subject may not be evenly distributed between the two groups, so any observed differences in the level of irritation between the two groups would not be due to the cream with no active ingredient. All 100 subjects were exposed to poison ivy. Fifty were then randomly assigned to the group with the new cream, and 50 were randomly assigned to the group with the cream with no active ingredient. After three days, the subjects' level of irritation was measured. new cream. O The variability between each subject would be evenly distributed between the two groups, so any observed differences in the level of irritation between the two groups are more likely due to the new cream. O The variability between each type of cream would be evenly distributed between the two groups, so any observed differences in the level of irritation between the two groups are guaranteed to be due to the subjects. O The variability between each subiect mav not be

Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter11: Data Analysis And Probability
Section: Chapter Questions
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A new cream was developed to reduce the irritation
caused by poison ivy. To test the effectiveness,
researchers placed an ad online asking for volunteers
to participate in the study. One hundred subjects
replied and were informed that one group would
Which of the following statements is true about the
benefits of random assignment?
O The variability between each subject may not be
evenly distributed between the two groups, so any
receive the new cream and the other would receive a
observed differences in the level of irritation
between the two groups would not be due to the
cream with no active ingredient. All 100 subjects were
exposed to poison ivy. Fifty were then randomly
assigned to the group with the new cream, and 50
were randomly assigned to the group with the cream
with no active ingredient. After three days, the
subjects' level of irritation was measured.
new cream.
O The variability between each subject would be
evenly distributed between the two groups, so any
observed differences in the level of irritation
between the two groups are more likely due to the
new cream.
O The variability between each type of cream would
be evenly distributed between the two groups, so
any observed differences in the level of irritation
between the two groups are guaranteed to be due
to the subjects.
O The variability between each subiect mav not be
Transcribed Image Text:A new cream was developed to reduce the irritation caused by poison ivy. To test the effectiveness, researchers placed an ad online asking for volunteers to participate in the study. One hundred subjects replied and were informed that one group would Which of the following statements is true about the benefits of random assignment? O The variability between each subject may not be evenly distributed between the two groups, so any receive the new cream and the other would receive a observed differences in the level of irritation between the two groups would not be due to the cream with no active ingredient. All 100 subjects were exposed to poison ivy. Fifty were then randomly assigned to the group with the new cream, and 50 were randomly assigned to the group with the cream with no active ingredient. After three days, the subjects' level of irritation was measured. new cream. O The variability between each subject would be evenly distributed between the two groups, so any observed differences in the level of irritation between the two groups are more likely due to the new cream. O The variability between each type of cream would be evenly distributed between the two groups, so any observed differences in the level of irritation between the two groups are guaranteed to be due to the subjects. O The variability between each subiect mav not be
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