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Suppose that, in fact, the blood cholesterol level of all men aged 20 to 34 follows the normal distribution with mean of u = 188 milligrams per deciliter (mg/dl) and standard deviation = 41 mg/dl.
1. Choose an SRS of 100 men from this population. What is the sampling distribution of x? What is the probability that x takes a value between 185 and 191 mg/dl? This is the probability that x estimates u within ± 3 mg/dl.
2. Choose an SRS of 1000 men from this population. Now what is the probability that x falls within ± 3 mg/dl of u? The larger sample is much more likely to give an accurate estimate of u.
3. Compute the z score and find the level of probability on the normal probability table. Why are the probability levels so different?
the daytime maximum temp of a city is 33 degrees C. At night the temp became 26 degrees c. what is the rise in temperature from daytime to night time?
It takes 5 hours to fill an empty tank when both outlet pipes are open. When one outlet pipe is closed, it takes 3 hours to fill the tank. Find the flow rates (in gallons per hour) in and out of the pipes.
The ages of workers in the Illuminex plant are approximately normally distributed with a mean of 42 years and a standard deviation of 10 years. A worker is stopped at random and asked to fill out a questionnaire. What is the probability that this ..
Solving probability problems based on empirical rule
The lateral area of a rectangular prism with height of 5 feet is 175 feet squared. What is the perimeter of the base?
An airplane is flying at an airspeed of 505 km/hr in a wind blowing at 60 km/hr toward the southeast. In what direction should the plane head to end up going due east.
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 ?
The Happy Hound Haven Company estimates that the revenue (in dollars) from the sale of x doghouses is given by R(x)= 625+.03x+.0001x^2.
if light bulbs have lives that are normally distributed with a mean of 2500 hours and a standard deviation of 500 hours
Give a formula for the annual inventory control costs, C, as a function of the maximum storage size, s. (This would only be valid for the first five years.)
A Norman window has the shape of a semicircle atop a rectangle so that the diameter of the semicircle is equal to the width of the rectangle. What is the area of the largest possible Norman window with a perimeter of 23 feet?
Question babsed on wff-formation rules. Let L be a language whose wff-formation rules are the following..
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