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An organization administers exams to a nationwide sampling of students to assess the quality of education in America. Suppose the organization would like to estimate the population proportion of American school children who would answer a given question correctly. Find a sample size which would give a margin of error of 0.03 with 90% confidence.
Control A certain machine that is used to manufacture screws produces a defect rate of .01. A random sample of 20 screws is selected. Find the probabilities that the sample contains the following
Martin just finished working on a job in which he spent 7 hours on Monday doing prep work and 8.5 hours on Wednesday painting. How much money doe John owe him?
Consider the population model dP/dt=.3(1-P/200)(P/50-1)where P(t) is the population at time t. For what values of P is the population in equilibrium?
Solving problems conditional probability
Operator A began working at 9 AM. The probability that Operator A finishes before Operator B is 0.90. What time did operator B start working?
use the precise definition of a limit lim x --gt infinity of fxl to prove that lim x --gt infinity of xcosxx
suppose that the cost function in exercise 45 is C(x) = -2.5x+1, where z is the index-fund fee. (the company has a fixed cost of $1 billion dollars, and the cost decreases as a function of the index-fund fee.) find the value of x that maximizes pr..
what is the probability that one of these resistors picked at random will have a resistance of 16 ohms or more?
In the World Series, one National League team and one American League team compete for the title, which is awarded to the first team to win four games. In how many different ways can can the series be completed?
The problem is: Z = X COS Y - Y COS X-Find all of the first and second partial derivatives of this problem.
Suppose that the number of homes built can be modeled by an exponential function, H= p * at , (H = p*a^t) where p is the number of new homes built in the first year recorded, and t is the number
You drop a coin down a wishing well of unknown depth h and hear a splash 4 seconds later. You know that the distance the coin covers t seconds after being dropped is 1/2 gt2, where g = 9.8 m/s2 is the acceleration due to gravity, and that the spee..
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