Posted by **Len** on Tuesday, March 23, 2010 at 12:28am.

Having trouble knowing where to start with this one:

A maker of tools claims the average amount of time it takes to assemble a table saw is 50 mins with a standard deviation of 40 mins. What is the probability that the sample mean will be less than 44 mins if a random sample of 64 buyers of the saw is taken?

Thanks for any help!

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