Math, asked by khushisolanki1119, 6 months ago

A sample of 26 bulbs gives a mean life of 990 hours with a SD of 20 hours the manufacturer claims that the mean life of bulbs is 1000 hours is the sample not up to standard?

Answers

Answered by anantkagrawal2000

3

Answer:

apne kam karne na apna kam kar na apna kam karne

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