Question

when the production manager finds the average life of her bulb - lifetime data, it is an example of what phase of inferential statistics?
a. probability - based inference
b. data gathering
c. data organization
d. data analysis

Explanation:

Finding the average of bulb - lifetime data involves analyzing the collected data. Data analysis in inferential statistics includes calculating summary statistics like the average. It is not about gathering data (already done), organizing data (basic structuring), or making probability - based inferences (not yet at that stage of using the average to infer about a population).

Answer:

D. Data analysis