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What is the approximate power of each of the following planned studies, all using a t-test for independent means at the 0.05 significance level, two tailed, with a predicted medium effect size?
Study N1 N2
A 90 10
B 50 50
C 6 34
D 20 20
construct a histogram and a frequency polygon for the following data.class intervalfrequency30-under 32532-under
find the statistic that measures the width of dispersion (looseness or tightness) of the population data about its mean .
Calculate the margin of error that would be used to determine a 99% confidence interval for the mean pulse rate of all women.
Let A be a 4x5 matrix. If a1,a2,a3 are linearly independent and a3=a1-3a2, a5=a1-2a2-3a4, determine the reduced row echelon form of A.
cursion boat is proportional to the cube of its speed and is $40 per hour when the speed is 10 mph. Expenses are $270 per hour. Find the most economical speed at which to make a trip of any specified distance.
Interest from the 6% account is paid out annually and is reinvested at an annual effective discount rate of 4%. At the end of the thirty years, the funds are liquidated. Find the investor's accumulated value at the time of liquidation.
solve the following system of linear equations by using gauss seidal method starting from x1 x2 x3 1 0 1. perform six
A conical water tank with vertex down has a radius of 10 feet at the top and is 29 feet high. If water flows into the tank at a rate of 20 {rm ft}^3{rm /min}, how fast is the depth of the water increasing when the water is 13 feet deep?
One study found that, all other things being equal, the number of seconds that a yellow light should be on is a linear function of the width of the crossing-street in feet.
A closed rectangular box has a volume of 32 cubic centimeters. What are the lengths of the edges giving the minimum surface area?
Probability when throwing five six-sided dice, Compute the probabilities for each of the following when you throw five-six handed dice.
dxdt -6x-10ydydt 10x6yexy 5x26xy5y2a. verify that e is a constant of motion for the system of the first two
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