In a simple random sample of 80 automobiles registered in

Assignment Help Basic Statistics

Reference no: EM13628945

In a simple random sample of 80 automobiles registered in Jland , 28 of them were found to have emission levels that exceed a state standard. let p be the proportion of all automobiles in Jland hat have emission levels that exceed the state standard.

a) What proportion of automobiles in the sample had emission levels that exceed the standard?

b) Obtain a point estimate for p.

c) Using the classical confidence interval ( not score) construct a 98% confidence interval for p.

d) Using the classical confidence interval ( not score) construct a 99.9% confidence interval for p.

e) Using your estimate from part b as p, calculate the probability that between 3 and 5 ( 3?x?5) of the next 10 automobilies inspeted have emission levels that exceed the state standard.

f) How many automobilies would have to be tested to guarantee that a 98% confidence interval will have a length of no more than .20?

Reference no: EM13628945

Questions Cloud

During a 100 m sprint usain bolt reaches his maximum speed : during a 100 m sprint usain bolt reaches his maximum speed in 2 seconds from rest with constant acceleration. he then

We roll a fair die repeatedly until we see the number 4 : we roll a fair die repeatedly until we see the number 4 appear and then we stop. find the probability that we needed an

Calculate the work required to compress air from standard : calculate the work required to compress air from standard atmosphereic pressure to 2.3 atm in kjkg air.a. assume a

A vessel contains 2 litres of gas at a pressure of 300kpa : a vessel contains 2 litres of gas at a pressure of 300kpa and a temperature of 27 degrees c. 3 litres of gas at the

In a simple random sample of 80 automobiles registered in : in a simple random sample of 80 automobiles registered in jland 28 of them were found to have emission levels that

Its maximum altitude is h determine and plot the fraction : a projectile is launched from point a and lands on the same level at d. its maximum altitude is h. determine and plot

Assuming ideal-gas behavior for air steady flow and : air enters a compressor at 105 kpa and 300 k with a volumetric flow rate of 12 m3min and exits at 1200 kpa and 400 k.

A 015-m-diameter pulley turns a belt rotating the : a 0.15-m-diameter pulley turns a belt rotating the driveshaft of a power plant pump. the torque applied by the belt on

Rope bca passes through a pulley at point c and supports a : rope bca passes through a pulley at point c and supports a crate at point a. rope segment cd supports the pulley and is

User Account

All Pages