Use the following scenario to answer the next three questions: A researcher wants to examine whether there is a relationship between amount of time spent on electronic devices and attention span (measured in milliseconds). 

Grading note: total question = 3 pts (1 pt for listing both variables and 1 pt per each correct scale of measurement) 
Answer: 

Answer: 
Sol:
The two variables are:
(1)Amount of time pent on electronic devices
(2)Attention span
scale of measurement:
Amount of time pent on electronic devices is quantitative variable and its scale is
INTERVAL
Attention span is quantitative variable and its scale is
INTERVAL
Solution2:
Which specific statistical test is most appropriate? (
Regression is more appropriate to check whether there is a relationship between
Amount of time pent on electronic devices
and Attention span
Regression equation can be set up as
Attentionspan=a+b*Amount of time pent on electronic devices
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