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 analysis
B. Data organization
C. Probability-based inference
D. Data gathering

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 analysis
 		B.	Data organization
 		C.	Probability-based inference
 		D.	Data gathering

tkhunny · Answer

Answer is still the same.

"production manager tests 10 toothbrushes"  Data gathering
"their mean lifetime is 450 hours" - Data analysis
"stating that consumers can expect it to last approximately 460 hours" - Probability-based inference

What "bulb"?  I thought these were "toothbrushes".