Find probability that specimen will contain detectable level

Assignment Help Civil Engineering

Reference no: EM13317065

The article "Leachate from Land Disposal Residential Construction Waste" (authored by W.J. Weber, Y.-C Jang, T.G. Townsend, and S. Laux, Journal of Environmental Engineering, 128(3): 237 - 245, 2002) presents a study on contamination at landfills containing construction and demolition wastes. Specimens of leachate were taken from a test site. Out of 42 specimens, 26 contained detectable levels of lead. 41 contained detectable levels of arsenic, and 32 contained detectable levels of chromium.

(a) Determine a 90% confidence interval for the probability that a specimen will contain a detectable level of lead.

(b) Determine a 95% confidence interval for the probability that a specimen will contain a detectable level of arsenic.

Reference no: EM13317065

Questions Cloud

Calculate the nominal and the effective rate of return : A 10-year, 12%, $1,000 bond that pays dividends quarterly can be purchased for $900. If the bond is purchased and pays as scheduled, calculate the nominal and the effective rate of return that the purchaser receives.

What value of absolute zero does the calibration yield : In a student experiment, a constant-volume gas thermometer is calibrated in liquid nitrogen (?196°C), What value of absolute zero does the calibration yield

Find the p-value to provide adequate compressive strength : A new concrete mix is being designed to provide adequate compressive strength for concrete blocks. The specification for a particular application calls for the blocks to have a mean compressive strength greater than 1350 kPa.

Estimate the maximum flow speed : A straight horizontal pipe with a diameter of 1.0 cm and a length of 47 m carries oil with a coefficient of viscosity of 0.13 N · s/m2. Estimate the maximum flow speed if the flow must be streamline

Find probability that specimen will contain detectable level : The article "Leachate from Land Disposal Residential Construction Waste" (authored by W.J. Weber, Y.-C Jang, T.G. Townsend, and S. Laux, Journal of Environmental Engineering, 128(3): 237 - 245, 2002) presents a study on contamination

Find the gauge pressure at the pipe input : To lift a wire ring of radius 1.95 cm from the surface of a container of blood plasma, a vertical force of 1.79 10-2 N greater than the weight of the ring is required. Find the gauge pressure at the pipe input

Find the buoyant force acting on the balloon : A spherical weather balloon is filled with hydrogen until its radius is 3.10 m. Its total mass including the instruments it carries is 11.0 kg. Find the buoyant force acting on the balloon

What is the cursor-position code : Assurning that the internal clock rate of the microcontroller is 2.5MHz. What should the Bignum value for the LoopTime subroutine be to make it count with a scale of 2,500 cyclesto generate precisely a imillisecond delay between every rollover of ..

Googles strategy in 2012 : Discuss competition in the search industry. Which of the five competitive forces seem strongest? weakest? What is your assessment of overall industry attractiveness and How is the search industry changing

User Account

All Pages