The undrained shear strength of a clay has a mean value of 44.85 kN/m² and a standard deviation of 6.56 kN/m². Fit these values to a normal distribution.
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- A granular soil has an angle of friction with a mean value of 40° and a coefficient of variation of 2.5%. Determine the corresponding mean and standard deviations values for the bearing capacity coefficient, N..The table below shows the results from the specific gravity (S.G.) test performed in a soil laboratory including twenty samples of sand. Determine the Coefficient of Quartile Variation."Durable press" cotton fabrics are treated to improve their recovery from wrinkles after washing. "Wrinkle recovery angle" measures how well a fabric recovers from wrinkles. Higher is better. Here are data on the wrinkle recovery angle (in degrees) for two types of treated fabrics: Permafresh Hylite 10 15 12 18 15 19 11 17 13 14 A manufacturer wants to know how large is the difference in mean wrinkle recovery angle. Give a 90% confidence interval for the difference in mean wrinkle recovery angle: [three decimal accuracy] [three decimal accuracy]
- "Durable press" cotton fabrics are treated to improve their recovery from wrinkles after washing. "Wrinkle recovery angle" measures how well a fabric recovers from wrinkles. Higher is better. Here are data on the wrinkle recovery angle (in degrees) for the same fabric specimens discussed in the previous exercise: Permafresh Hylite 156 148 152 197 151 187 122 142 133 A manufacturer wants to know how large is the difference in mean wrinkle recovery angle. a. The mean and the standard deviation for the Permafresh are: Round to 3 decimal places. Round to 3 decimal places. b. The mean and the standard deviation for the Hylite are: Round to 3 decimal places. Round to 3 decimal places. c. The standard error is: SE = Round to 3 decimal places. The critical value from the distribution for a confidence interval of 99.8% is: t= Use degrees of freedom of 3. Use Technology. Round to 3 decimal places. d. Using the the answer from above (all rounded to 3 decimal places), calculate by hand a 99.8%…The compressive strength of concrete is normally distributed with mean 140 psi and variance 106 psi. A random sample of 54 specimens is collected. What is the standard error of the sample mean? a.)0.191 b.)1.321 c.)1.401 d.)1.744 e.)1.963 f.)14.425The angle of friction of a soil has a mean value of 35° and a standard deviation of 5°. Determine the mean value and standard deviation of tan o.
- "Durable press" cotton fabrics are treated to improve their recovery from wrinkles after washing. "Wrinkle recovery angle" measures how well a fabric recovers from wrinkles. Higher is better. Here are data on the wrinkle recovery angle (in degrees) for the same fabric specimens discussed in the previous exercise: Permafresh Hylite 106 165 126 171 155 142 153 187 117 A manufacturer wants to know how large is the difference in mean wrinkle recovery angle. The mean and the standard deviation for the Permafresh are: ¯x= s= Round to 3 decimal places. 2. The mean and the standard deviation for the Hylite are: ¯x= s= Round to 3 decimal places. 3.The standard error is: SE = ________ Round to 3 decimal places. The critical value from the distribution for a confidence interval of 98% is: t*= ________Use degrees of freedom of 3. Use Technology Round to 3 decimal places. Using the the answer from above (all rounded to 3 decimal places), calculate by hand a 98%…describe what is measured by the standard error of M?.I have attached the density measurements in the pictures. Please find the standard deviation of the measurements
- The driver of a certain bus line traveled 1000 km in four sections of 250 km each, with speeds of 92 km / h, 85 km / h, 95 km / h and 80 km / h, respectively. Calculate the average speed with which he made the trip and compare it with the harmonic mean of the data.The following data represent the results obtained from the specific gravity (S.G.) test performed in a soil laboratory including for sand * ?samples. Find the modeThe torque, T(N.m), required to rotate shafts of different diameters, D(mm), on a machine is shown in the table below. If the low is: T = aD" where a and n are constants. Determine the constants a and n to give the best fit to following data: D (тm) | 7.0 T (N.m) 0.974 Then standard deviation (S,) about the mean. 10 1.71 25 18 4.33 40 15.3 7.28