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

anonymous · Answer

I'm thinking A

tkhunny · Answer

Failing to tell the truth?  There is no basis for this probability-based inference.

anonymous · Answer

im sorry i dont understand @tkhunny

tkhunny · Answer

manager tests 10 toothbrushes 

Data gathering

 finds that their mean lifetime is 450 hours

Data analysis

stating that consumers can expect it to last approximately 460 hours

Probability-based inference

anonymous · Answer

@summertimesadness I agree with @tkhunny. I think it covers all the phases of inference. Data organization is not declared but probably would fall between gathering and analysis

anonymous · Answer

so C @CarlosGP