If have mean of 250

hours and a standard deviation of 20 hours.

How i can find the What percentage of battery packs lasts longer than 260 hours?

If a simple random sample of four battery packs is selected from your company and we

assume that their life spans are independent, what is the probability that they all last

longer than 260 hours?

hours and a standard deviation of 20 hours.

How i can find the What percentage of battery packs lasts longer than 260 hours?

If a simple random sample of four battery packs is selected from your company and we

assume that their life spans are independent, what is the probability that they all last

longer than 260 hours?

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