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  3. 1. assume that x has a normal distribution with th

1. Assume that x has a normal distribution with the specified mean and standard deviation. Find the...

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Statistics

1.Assume that x has a normal distribution with the specified mean andstandard deviation. Find the indicated probability.
mean=100, stadard dev. = 18

P(x> or = 120) = ?

2. Thickness measurements of anciwnt prehistoric NativeAmerican pot shards discovered in a Hopi village are approximatelynormally distributed, with a mean of 4.6 mm and a standard dev. of1.5mm. For a randomly found shard, find the followingprobabilities.

a) The thickness is less than 3.0mm
b) The thickness is more than 7.0mm
c) The thickness is between 3.0mm and 7.0mm

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