SOPHIA STATISTICS Q & A
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You passed this Milestone
1
A hunter is practicing his aim using a practice target. He takes 5 shots. All 5 shots hit the target, but
they do not hit or surround the bullseye. In addition, all 5 shots are very spread apart on the target.
Classify the hunter's accuracy and precision.
Low accuracy and high precision
High accuracy and high precision
Low accuracy and low precision
, SOPHIA STATISTICS Q & A
High accuracy and low precision
RATIONALE
Since the arrows fall away from the bullseye and are spread out we would classify this as low accuracy and low
precision.
CONCEPT
Accuracy and Precision in Measurements
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A different coffee seller offered to sell coffee to Jenae's company for half the cost of their current brand.
Jenae knew her co-workers were really partial to the coffee they drank now, so she decided to conduct a
study to see if they noticed the difference in flavor. Her co-workers were convinced they would.
Jenae provided each person with a sample and said that some had the new coffee and some did not. Only Jenae
knew who had which brand of coffee.
Jenae's strategy is an example of a(n) .
matched-pair designed experiment
randomized experiment
blind experiment
, SOPHIA STATISTICS Q & A
completely randomized experiment
RATIONALE
Since participants are unaware of what group they are in, regular or new coffee group, this is referred to
as blinding in an experiment.
CONCEPT
Blinding
Jenae noticed that many of her co-workers would opt for the coffee that appeared to be most recently brewed,
regardless of the flavor of the coffee offered. This leads her to believe that what she was witnessing was not
really representative of everyone's true flavor preferences. She adapted her experimental study accordingly.
Select one control in Jenae's experimental study.
Jenae places condiments at random places throughout the kitchen.
Jenae makes sure that the coffee in different pots is brewed at the same time.
Jenae uses different locations in the kitchen for the coffee pots.
, SOPHIA STATISTICS Q & A
Jenae monitors the habits of the co-workers who do not drink coffee.
RATIONALE
In an experiment, controls are when conditions are manipulated by the experimenter to keep conditions as
consistent as possible. In this example Jenae brews coffee at the same time, so this is a control.
CONCEPT
Experimental Design
I need help with this question
Score 25/29
You passed this Milestone
1
A hunter is practicing his aim using a practice target. He takes 5 shots. All 5 shots hit the target, but
they do not hit or surround the bullseye. In addition, all 5 shots are very spread apart on the target.
Classify the hunter's accuracy and precision.
Low accuracy and high precision
High accuracy and high precision
Low accuracy and low precision
, SOPHIA STATISTICS Q & A
High accuracy and low precision
RATIONALE
Since the arrows fall away from the bullseye and are spread out we would classify this as low accuracy and low
precision.
CONCEPT
Accuracy and Precision in Measurements
I need help with this question
A different coffee seller offered to sell coffee to Jenae's company for half the cost of their current brand.
Jenae knew her co-workers were really partial to the coffee they drank now, so she decided to conduct a
study to see if they noticed the difference in flavor. Her co-workers were convinced they would.
Jenae provided each person with a sample and said that some had the new coffee and some did not. Only Jenae
knew who had which brand of coffee.
Jenae's strategy is an example of a(n) .
matched-pair designed experiment
randomized experiment
blind experiment
, SOPHIA STATISTICS Q & A
completely randomized experiment
RATIONALE
Since participants are unaware of what group they are in, regular or new coffee group, this is referred to
as blinding in an experiment.
CONCEPT
Blinding
Jenae noticed that many of her co-workers would opt for the coffee that appeared to be most recently brewed,
regardless of the flavor of the coffee offered. This leads her to believe that what she was witnessing was not
really representative of everyone's true flavor preferences. She adapted her experimental study accordingly.
Select one control in Jenae's experimental study.
Jenae places condiments at random places throughout the kitchen.
Jenae makes sure that the coffee in different pots is brewed at the same time.
Jenae uses different locations in the kitchen for the coffee pots.
, SOPHIA STATISTICS Q & A
Jenae monitors the habits of the co-workers who do not drink coffee.
RATIONALE
In an experiment, controls are when conditions are manipulated by the experimenter to keep conditions as
consistent as possible. In this example Jenae brews coffee at the same time, so this is a control.
CONCEPT
Experimental Design
I need help with this question
