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Maksim231197 [3]
3 years ago
15

5. Thickness measurements of ancient prehistoric Native American pot shards discovered in a Hopi village are approximately norma

lly distributed, with a mean of 5.1 millimeters (mm) and a standard deviation of 0.7 mm. What percent (%) of ancient prehistoric Native American pot shards discovered in this area has thickness measurement thinner than 3.
Mathematics
1 answer:
Triss [41]3 years ago
4 0

Answer:

percent (%) of ancient prehistoric thinner than 3 is 0.0013

Step-by-step explanation:

Given data

mean =  5.1 millimeters (mm)

standard deviation = 0.7 mm

to find out

percent (%) of ancient prehistoric thinner than 3

solution

we have given mean and SD

so Z will be = x -mean  / SD

Z = ( x - 5.1 ) / 0.7

so P( x < 3 ) = P ( (x - 5.1 ) / 0.7  <  ( 3 - 5.1 ) / 0.7 )

P( Z  = ( 3 - 5.1 ) / 1.5 )

P( Z  =  -3 ) = 0.0013

percent (%) of ancient prehistoric thinner than 3 is 0.0013

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