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If Janice gets a 70 on a physics test where the mean is 76 and the standard deviation is 4, where does she stand in relation to her classmates? Note: When you see such a problem, assume you are working with a normal distribution, even though it might be unstated. Tip: Use z-scores and normal distribution stuff to find out what percent of the students scored less than Janice.
At Western University, the historical mean of scholarship examination scores for freshmen applications is 900. A historical population standard deviation is 180. Each year, the assistant dean uses a sample of applications to determine whether the ..
Perform the last step in the hypothesis test. Do you reject the null hypothesis or fail to reject the null hypothesis?
plane can travel 490 miles per hour with wind and 410 miles per hour against the wind, find the speed of the plane in still air.
A man rows a boat 350 feet upstream against a constant current in 10 minutes. He then rows 275 feet downstream (with the same current) in 5 minutes. Find the speed of the current and the equivalent rate at which he can row in still water.
What happens to the graph if T = 50? When tastes and preferences change ceteris paribus, what happens to demand?
The number of bacteria N in a culture is given by the model N=250e^kt, where t is the time in hours, with t=0, corresponding to the time when N=250.
find the general solution of the given differential equaion. give the largest interval I over which the general solution is defined. Determine whether there are any transient terms in the general solution.
A large bag of marble contains 117 blue marbles, 229 red marbles, and 104 yellow marbles. What percent of the marbles are blue?
The doubling period of a baterial population is minutes. At time minutes, the baterial population was 60000. For some constant A, the formula for the population is where . What was the initial population at time ?
I get the critical points are(0,0) and(-2^1/5, 4^1/5). Then I get det(0,0)=2 and det(-2^1/5, 4^1/5)=-10, so index of the system is -8 and the index of periodic orbit is 1, so there's no periodic orbit.
a walkway forms the diagonal of a square playground. The walkway is 24 m long. to the nearest tenth of a meter how long is a side of the playground.
In Martian number system, 5 and 8 are the roots of the equation 5X2 - 50X + 125 = 0. Assuming that the number system on Mars developed in the same way as the number system on Earth, how many fingers does a Martian have?
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