Problem 1, this investigation requires that the causal variable and the outcome variable occur together, the causal variable and the effect variable occur sequentially, and the relationship between the causal variable and the outcome variable is established while controlling the exogenous variable . Which of the following is this survey?

1). exploratory investigation

2). technical investigation

3). causal investigation

Problem 2, this investigation is to identify the cause of the problem in a situation where the current situation of the company cannot be understood. And it's called qualitative research. How is this investigation conducted?

1). exploratory investigation

2). technical investigation

3). causal investigation

Question 3, which of the following is not a major exogenous variable?

1). maturation effect

2). test effect

3). Change in measurement method

4). test unit extinction

5). Conjoint analysis

Question 4, which of the metrics used in marketing research is not applicable?

1). cluster scale

2). rank scale

3). Interval scale

4). Nominal scale

5). ratio scale