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Suppose a batch of metal shafts produced in a manufacturing company have a standard deviation of...

Suppose a batch of metal shafts produced in a manufacturing company have a standard deviation of 1.3 and a mean diameter of 202 inches.

If 70 shafts are sampled at random from the batch, what is the probability that the mean diameter of the sample shafts would be less than 201.9 inches? Round your answer to four decimal places.

math   Statistics-And-Probability   
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Answer #1

Sot Oce) , co e have to kndcut: Gobobitity thet the mon dhamctes the Sompe shots coud be lesthon 201 inchea tHeve, e are uing Nommal distsibution, becauxe aiven Question. co holde nean, standad deviation, and η Value X- U Heye, homgtv en dato, ơH3 ท 70 1-318.366 0.1553 P-0.6439 fo the słandayd Normaltbe, o can get the valiue of -o-6439 i% 0.9611 PLXL 201.9) = 0 8611 be lessthan aol .9 c

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