Deep mixing is a ground improvement method developed for soft soils like clay, silt, and peat. Swedish civil engineers investigated the properties of soil improved by deep mixing with lime-cement columns in the journal Giorisk (Vol. 7, 2013). The mixed soil was tested by advancing a cylindrical rod with a cone tip down into the soil. During penetration, the cone penetrometer measures the cone tip resistance (megapascals, MPa). The researchers established that tip resistance for the deep mixed soil followed a normal distribution with u =2.2 MPa and o = 0.9 MPa. Complete parts a through c below. a. Find the probability that the tip resistance will fall between 1.5 and 3.9 MPa. The probability is . (Round to four decimal places as needed.)

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Deep mixing is a ground improvement method developed for soft soils like clay, silt, and peat. Swedish civil engineers investigated the properties of soil improved by deep mixing with
lime-cement columns in the journal Giorisk (Vol. 7, 2013). The mixed soil was tested by advancing a cylindrical rod with a cone tip down into the soil. During penetration, the cone
penetrometer measures the cone tip resistance (megapascals, MPa). The researchers established that tip resistance for the deep mixed soil followed a normal distribution with µ = 2.2
MPa and o = 0.9 MPa. Complete parts a through c below.
a. Find the probability that the tip resistance will fall between 1.5 and 3.9 MPa.
The probability is
. (Round to four decimal places as needed.)
Transcribed Image Text:Deep mixing is a ground improvement method developed for soft soils like clay, silt, and peat. Swedish civil engineers investigated the properties of soil improved by deep mixing with lime-cement columns in the journal Giorisk (Vol. 7, 2013). The mixed soil was tested by advancing a cylindrical rod with a cone tip down into the soil. During penetration, the cone penetrometer measures the cone tip resistance (megapascals, MPa). The researchers established that tip resistance for the deep mixed soil followed a normal distribution with µ = 2.2 MPa and o = 0.9 MPa. Complete parts a through c below. a. Find the probability that the tip resistance will fall between 1.5 and 3.9 MPa. The probability is . (Round to four decimal places as needed.)
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