Exam (elaborations)
STA 270 TEST QUESTIONS AND CORRECT ANSWERS
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STA 270 TEST QUESTIONS AND CORRECT ANSWERS...
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Identify the cases and variables in the situations below, label thevariables as categorical or quantitative
Asking US citizens whether or not they support gun control - ANSWER
cases: US citizens
Categorical Variable: support or not support
Identify the cases and variables in the situations below, label the
variables as categorical or quantitative
Asking college students how many hours of sleep they got last night -
ANSWER Cases: college students
Quantitative Variable: hours of sleep
Identify the explanatory and response variables in the situations below
Does meditation reduce stress? - ANSWER Explanatory:
Meditation
Response: Stress
Identify the explanatory and response variables in the situations below
Is excess energy caused by sugar? - ANSWER Explanatory: sugar
Response: energy
Can choosing the right music make wine taste better?
Each of 250 volunteers was assigned at random to one of five rooms
where they were asked to taste and rate a glass of wine. In one of the
rooms, no music was playing and a different style of music was playing
in each of the other four rooms. The researchers concluded that
, cabernet sauvignon is perceived as being richer and more robust when
bold music is played than when no music is heard
Identify the sample under study - ANSWER 250 volunteers
Can choosing the right music make wine taste better?
Each of 250 volunteers was assigned at random to one of five rooms
where they were asked to taste and rate a glass of wine. In one of the
rooms, no music was playing and a different style of music was playing
in each of the other four rooms. The researchers concluded that
cabernet sauvignon is perceived as being richer and more robust when
bold music is played than when no music is heard
Classify the study as experimental or observational - ANSWER
experimental
Can eating a yoghurt a day cause people to lose weight
What are the cases - ANSWER People
Can eating a yoghurt a day cause people to lose weight?
What are the variables and classify them as categorical or quantitative -
ANSWER Categorical: Eating yoghurt
Quantitative: amount of weight lost
the following data represents damage claims in Arizona
99,80,71,70,65,62,59,58,54,52,48,45,32,30,28,25
give the five number summary - ANSWER Min=25
Max= 99
Median/Q2= 56
Q1= 38.5
Q3=67.5
the following data represents damage claims in Arizona
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