Math, asked by sanjeevani111982, 5 months ago

Duracell manufactures batteries that the CEO claims will last an average of 300 hours under normal use. A researcher randomly selected 20 batteries from the production line and tested these batteries. The tested batteries had a mean life span of 270 hours with a standard deviation of 50 hours. Do we have enough evidence to suggest that the claim of an average lifetime of 300 hours is false?  



Data:  


Hypothesis:



Test statistic:  



Decision Rule:




Answers

Answered by prachisoumyaps38
7

Here is your answer

 \sqrt[?]{?}

Attachments:
Similar questions