Question
In: Statistics and Probability
The managers of three different supermarkets in the US desire to test the effectiveness of a...
The managers of three different supermarkets in the US desire to test the effectiveness of a new store design on sales. The manager of supermarket A decides to let store directors choose on their own whether they judge appropriate to implement the new design. The manager of supermarket B randomly chooses stores to assign the new design. The manager of supermarket C randomly draws stores in each US State separately.
(a) State whether each of the three experimental designs is observational or experimental, providing an explanation.
(b) Which experimental design is implemented in each of the three studies?
(c) Which kind of bias will arise from design A? Why?
(d) Compare the quality of statistical results from Designs B and C. State which of the two prevails on your opinion and why.
Solutions
orchestra answered 2 years agoRelated Solutions
The managers of three different supermarkets in the US desire to test the effectiveness of a...
The managers of three different supermarkets in the US desire to
test the effectiveness of a new store design on sales. The manager
of supermarket A decides to let store directors choose on their own
whether they judge appropriate to implement the new design. The
manager of supermarket B randomly chooses stores to assign the new
design. The manager of supermarket C randomly draws stores in each
US State separately.
(a) State whether each of the three experimental designs is...
2. The managers of three different supermarkets in the US desire to test the effectiveness of...
2. The managers of three different supermarkets in the US desire
to test the effectiveness of a new store design on sales. The
manager of supermarket A decides to let store directors choose on
their own whether they judge appropriate to implement the new
design. The manager of supermarket B randomly chooses stores to
assign the new design. The manager of supermarket C randomly draws
stores in each US State separately.
(a) State whether each of the three experimental designs...
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5
10
15
1
0.6
6.5
1.1
2.1
1.5
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1.1
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An experiment was conducted to see the effectiveness of two antidotes to three different doses of...
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antidotes to three different doses of a toxin. The antidote was
given to a different sample of participants five minutes after the
toxin. Thirty minutes later the response was measured as the
concentration in the blood. What can the researchers conclude with
an α of 0.05?
Dose
Antidote
5
10
15
1
0.6
1.1
1.1
2.1
1.5
2.4
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An experiment was conducted to see the effectiveness of two antidotes to three different doses of...
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antidotes to three different doses of a toxin. The antidote was
given to a different sample of participants five minutes after the
toxin. Twenty-five minutes later the response was measured as the
concentration in the blood. What can the researchers conclude with
an α of 0.05?
Dose
Antidote
5
10
15
1
0.6
1.1
1.1
2.1
1.5
2.4
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5.9
2
1.6
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An experiment was conducted to see the effectiveness of two antidotes to three different doses of...
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antidotes to three different doses of a toxin. The antidote was
given to a different sample of participants five minutes after the
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concentration in the blood. What can the researchers conclude with
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5
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