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Question: A researcher has developed a new drug designed to reduce blood pressure. In an experiment, 21 subjects were assigned randomly to the treatment group, and received the new experimental drug. The other 23 subjects were assigned to the control group, and received a standard, well known treatment. After a suitable period of time, the reduction in blood pressure for each subject was recorded. A summary of these data is: n s Treatment group (new drug): 21 23.48 8.01 Control group (old drug): 23 18.52 7.15
A 95% confidence interval for the difference in reduction of blood pressure between these two drugs is (use Option 2, the conservative method for degrees of freedom)
Customers shopping at a particular supermarket spend a mean time shopping of 47 minutes,with a standard deviation of 11 minutes. Assuming a normal distribution, what is the probability that a randomly chosen customer will spend between 36 and 58 m..
A large explosion causes wood and metal debris to rise vertically into the air with an initial velocity of 96 feet per second. The polyomialh=96t-16t2h=96t-16t2gives the height,hh, of the falling debris above the ground, in feet,ttseconds after th..
How many functions map nothing to a j-element subset J of K? Another way to say this is if I have n distinct candy bars and k children Sam, Mary, Pat, etc., in how ways may I pass out the candy bars so that some particular j-element subset of the ..
Indicate whether the following statement is True or False
1. Find at least five U.S. Public funding sources. 2. Explain as a nonprofit organization how the Memory Dog can get grants from those public funding sources? (Memory dogs company web: http://www.memorydog.org)
A plane flies at a average speed of 300 miles per hour. The expression 300t gives the distance traveled by the plane in t hours. find the distance traveled by the plane in 8 hours.
Cars pass a certain street location according to a Poisson process with rate λ. A woman who want to cross the street at that location waits until she can see that no cars will come by in the next T time units.
The NOW function can be used to display the current date, time, or a combination of the two in several different formats.
Find the derivative of y with respect to x of y= 8ln(13x). Find the derivative of y with respect to t. y = t(ln 3t)2 , dy/dt=? Find the derivative of y= ln(tan-1(2x5)) with respect to x.
ONLINE RETAIL SALES Online retail sales stood at $23.5 billion for the year 2000. For the next 2 yr, they grew by 33.2% and 27.8% per year, respectively.
Find the eigenvalue closest to zero. In each case, set x0 = (1, 0, 0, 0) and carry out approximations until the approximating sequence seems accurate.
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?
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