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Z , X + Z ] 2 2 n n 4. Practice a. A random sample of 90 observations produced a mean x = 25.9 and a standard deviation s = 2.7. I. Find a 95% condence interval for . What is the margin of error? Ii. Find a 90% condence interval for . What is the margin of error? Iii. Find a 99% condence interval for . What is the margin of error? B. A random sample of 100 observations from a normally distributed population possesses a mean equal to 83.2 and a standard deviation equal to 6.4. Ii. What does it mean when you say that the condence level is 95%?
Make a table showing the probability distribution function(pdf) and cumulative distribution function (cdf) for X. Hint: draw a probability tree modeling the game.
What is the probability that a bag will weigh more than 40 pounds?
the doubling period of a baterial population is 10 minutes. At time t=110 minutes, the baterial population was 90000.
Biologists have noticed that the chirping of crickets of a certain species is related to temperature, and the relationship appears to be very nearly linear. A cricket produces 115 chirps per minute at 67 degrees Fahrenheit and 176 chirps per minut..
With a yearly rate of 3 percent, prices are described as P = P0 (1.03)t, where P0 is the price in dollars when t = 0 and t is time in years. If P0 is 1.2, how fast are prices rising when t = 15?
If I am correct, the answer guide says this one converges but my answer is going to infinity which is diverges. I need to see your steps to compare with mine please.
Use Cylindrical coordinates to evaluate the triple integral SSS_E sqrt(x^2+y^2)dV, where E is the solid bounded by the circular paraboloid z=16-1(x^2+y^2) and the xy-plane.
A spherical tank of radius 3m is half full of oil that has a density of 900kg/m3. Find the work W required to pump the oil out of a spout which extends 1.5m past the top of the sphere. (Use 9.8 for g and 3.14 for . Round your answer to three signi..
Sketch hyperbola after finding Center, Vertex and Foci of this equation: (y+5)squared/16 - xsquared/9 =1. Please show steps needed
Assuming that the weights of firemen are normally distributed, to test her research hypothesis the statistician would use a chi-square test. In that case, what is the computed test value?
foot water tower used to measure wind speed has a guy wire attached to it 175 feet above the ground. the angle between the wire and the vertical tower is 57 degree.
Should you develop this product? How do you make a decision in this situation? Also, how can one come up with the probability of success (or failure)?
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