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What are some other difference between test for independent groups and t test for matched groups? Do they both use the same set of assumptions? Why do we even need two different tests to analysis the experimental data?
Suppose you toss ten coins and count the number of heads. What is the probability that the number of heads you count will lie within two standard deviations of the mean?
The test must be performed at the 5% level of significance. According to the null hypothesis, the value of the population mean is parts per million.
in a physics class alex and mike were performing a hypothesis test concerning the mean amount of static electricity in
Think of your favorite casino game (craps, black-jack, roulette, etc) and analyze the probabilities of a few different outcomes.
Find the critical value for a right-tailed F-test when alpha=.05 the degrees of freedom for the numerator (d.f.N.) are 15, and the degrees of freedom for the denominator (d.f.N.) are 21.
If only 1.1% of the bus drivers have a weekly income of more than $429.35, what is the value of the standard deviation of the weekly earnings of the bus drivers?
To select a _________ sample, an intact group of subjects that represent the population is selected.
you were interested in how long the average psychology major at your college studies per night so you asked 10
the mean number of shares traded on on the new york stock exchange in june 2004 was 2.4 billion per day. assume that
ballast must weigh 150 kg. it can be made from two raw materials a with a cost of rs. 20 per unit and b with a cost of
Find how large a sample must be drawn in order to be 90 percent confident that the sample mean will not differ from the population mean by more than 3.7 pounds.
A university club consists of 4 men and 6 women. Two members are chosen at random without replacement. Let X = 0 if first person chosen is male, 1 if first person chosen is female. Y = 0 if second person chosen is male, 1 if second person chosen i..
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