In a(n) ________________, one or more variables are identified ...

[ssal]

In a(n) ________________, one or more variables are identified and controlled or manipulated so that data can be obtained about how they influence the variable of interest identified first.
 a. experimental study b. observational study
  c. categorical study d. variable study

Question 2

Data collected from several entities over a period of time (minutes, hours, days, etc.) are called
 a. categorical and quantitative data. b. time series data.
  c. source data. d. cross-sectional data.

[chinwesucks]

Answer to Question 1

a
RATIONALE: In an experimental study, a variable of interest is first identified. Then one or more other variables are identified and controlled or manipulated so that data can be obtained about how they influence the variable of interest.

Answer to Question 2

b
RATIONALE: Data that are collected over a period of time (minutes, hours, days, months, years, etc.) are known as time series data.

[ssal]

TYSM

[sultansheikh]

Wow, this really help