Question
In: Statistics and Probability
A researcher randomly divides 19 subjects into two groups. One group receives a new drug called...
A researcher randomly divides 19 subjects into two groups. One group receives a new drug called RT56 for 3 months, the other a placebo (looks like RT56, but is a sugar pill). She then measures reaction time (RT) on a complex task and finds the following RT s in seconds (s): Group 1 Group 2 RT56 Placebo N=10 N=9 .456 .532 .347 .458 .435 .768 .234 .643 .521 .678 .411 .569 .398 .486 .254 .647 .391 .501 .289 1. State the independent and dependent variables. 2. State the Null Hypothesis in words and symbols. 3. Compute the appropriate statistic. 4. What is the decision? 5. State the full conclusion in words.
Solutions
Expert Solution
Here Reaction time is dependent variable and treatment group like placebo and RT56 are independent variable.
Step1:
Null Hypothesis (Ho): The average reaction time is the same between
the placebo group and RT56 group.
Alternative Hypothesis (H1): The average reaction time is different between the placebo group and RT56.
We conclude that the average reaction time is different between the placebo group and RT56.
orchestra answered 2 years agoRelated Solutions
A researcher randomly divides 19 subjects into two groups. One group receives a new drug called...
A researcher randomly divides 19 subjects into two groups. One
group receives a new drug called RT56 for 3 months, the other a
placebo (looks like RT56, but is a sugar pill). She then measures
reaction time (RT) on a complex task and finds the following RT s
in seconds (s): Group 1 Group 2 RT56 Placebo N=10 N=9 .456 .532
.347 .458 .435 .768 .234 .643 .521 .678 .411 .569 .398 .486 .254
.647 .391 .501 .289
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A researcher randomly assigns 33 subjects to one of three groups. Group 1 receives technical dietary...
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interactively from an on-line website. Group 2 receives the same
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To test the effectiveness of a new drug, a researcher gives one group of randomly selected...
To test the effectiveness of a new drug, a researcher gives one
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Drug 32 (effective) 9 (ineffective)
Placebo 12 (effective) 18 (ineffective)
At 0.05, can the researcher conclude that the drug results
differ from those of the placebo? (Show ALL steps including
conditions).
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An educational psychologist randomly divides a sample of
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conclude with α = 0.05? The quiz data are below.
training
no training
6
4
6...
12 subjects in a study were randomly assigned into two equally sized groups. One group was...
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A group of volunteers are randomly divided into two groups. One group of participants takes a...
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N = 14 ...
To test the effectiveness of a new drug, a researcher gives one group of individuals the...
To test the effectiveness of a new drug, a researcher gives one
group of individuals the new drug and another group a placebo. The
results of the study are shown here. At α = 0.10, can the
researcher conclude that the drug is effective? Use the P value
method.
Medication
Effective
Not Effective
Obs.,
Exp
Obs., Esp
Drug
32
9
Placebo
12
18
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temperature? Let d=(body temperature after taking drug)−(body
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