A production manager tests 10 toothbrushes and finds that their mean lifetime is 450 hours. She then designs a sales package for this type of bulb stating that consumers can expect it to last approximately 460 hours. This is an example of what phase of inferential statistics?
A.Data gathering
B.Data analysis
C.Probability-based inference
D.Data organization

Question

A production manager tests 10 toothbrushes and finds that their mean lifetime is 450 hours. She then designs a sales package for this type of bulb stating that consumers can expect it to last approximately 460 hours. This is an example of what phase of inferential statistics?
A.Data gathering
B.Data analysis
C.Probability-based inference
D.Data organization

anonymous · Answer

toothbrushes to light-bulbs?

I would say B because the ops man is gathering data at the point of finding the bulb's mean life time. Designing the package and saying it'll last appx 460 hours sounds more like probability-based inference to me, since she is inferring, based off of a small sample, that all the bulbs will last. However, she did analyze the data as well. 

hope this help ☻