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 1 year 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...
Suppose a farmer wanted to test the effectiveness of three different types of fertilizer on strawberry...
Suppose a farmer wanted to test the effectiveness of three
different types of fertilizer on strawberry production: no
fertilizer, organic fertilizer, and non-organic fertilizer. Three
sections of strawberry fields are selected, a random sample of 5
strawberry plants from each section are selected at the end of the
growing season. The number of strawberries produced on each plant
is counted. The purpose of the study is to determine if type of
fertilizer affects strawberry production. Is there a significant
effect...
A researcher wanted to test the effectiveness of three different doses of medication on depression levels,...
A researcher wanted to test the effectiveness of three different
doses of medication on depression levels, so she recruited 60
people and split them evenly into the 3 groups. Below an ANOVA
summary table from his hypothetical experiment. Use this table
to answer questions below.
Source
SS
df
MS
F
Between
(A)
(C)
(F)
3.50
Within
570
(D)
(G)
Total
(B)
(E)
Using the information in the table (be sure to fill in, see
other ANOVA table based essay question),...
Suppose a cosmetics company wants to test the effectiveness of three different sales training programs. Steve,...
Suppose a cosmetics company wants to test the
effectiveness of three different sales training programs. Steve, an
analyst in the company's HR department, randomly assigns 18 new
employees, 6 each, to the training programs. After the training
program is complete, each employee takes a product knowledge and
sales skills assessment test, where scores are on a scale from 0 to
100.
Steve records the assessment test results for each
employee and analyzes the sample data. The distribution of test
scores...
Three department managers jointly decide to hire a consulting firm for advice on increasing departmental effectiveness...
Three department managers jointly decide to hire a consulting firm
for advice on increasing departmental effectiveness and efficiency.
The consulting firm spends 50% of their efforts in department A and
25% in each of the other two departments. The manager of department
A suggest that all three departments equally share the consulting
fee.
As a manager of one of the other two departments, respond to his
suggestion with a memo.
An experiment was conducted to see the effectiveness of two antidotes to three different doses of...
An experiment was conducted to see the effectiveness of two
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 0.01?
Dose
Antidote
5
10
15
1
0.6
6.5
1.1
2.1
1.5
2.4
3.1
4.1
5.9
2
1.1
1.2
1.1
1.7
1.3
1.5
2.1
3.1...
An experiment was conducted to see the effectiveness of two antidotes to three different doses of...
An experiment was conducted to see the effectiveness of two
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
3.1
4.1
5.9
2
1.1
2.5
1.1
1.7
1.3
1.5
2.1
3.1...
An experiment was conducted to see the effectiveness of two antidotes to three different doses of...
An experiment was conducted to see the effectiveness of two
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
3.1
4.1
5.9
2
1.6
1.2
1.1
1.7
1.3
1.5
2.1
3.1...
An experiment was conducted to see the effectiveness of two antidotes to three different doses of...
An experiment was conducted to see the effectiveness of two
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
α = 0.01?
Dose
Antidote
5
10
15
1
0.6
1.1
1.1
2.1
1.5
6.2
3.1
4.1
5.9
2
1.1
1.2
1.1
1.7
1.3
1.5
2.1
3.1
2.1...
ADVERTISEMENT
ADVERTISEMENT
Latest Questions
- S&P 500 Index is at 2780. A European June 21, 2019 SPX call option struck at...
- ou are required to post a minimum of one 200-word post in discussing this issue. 1-What...
- You are planning on retiring the moment that you accumulate $1,000,000 in your mutual fund. Currently,...
- Why must a power cycle release heat at some point
- Gaseous ammonia can be injected into the exhaust stream of a coal-burning power plant to reduce...
- You will find that we consume monopolies in our daily lives from our electricity to internet...
- A ball thrown straight up into the air is found to be moving at 7.24 m/s...
ADVERTISEMENT