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Prove that if two independent identically distributed random variables, X1 and X2, each taking the values I to 6, have the property that their sum will satisfy P[X1 + X2 = k] = P[X1 + X2 = 14 - k] = (k - 1)/36 for k = 2, 3, 4, 5, 6, and P[X1 + X2 = 7] = 6/36 then P[X1 = k] = P[X2 = k] = i for k = 1,2, ... ,6.
a random sample of n 25 scores is selected from a normal population with a mean 40. after a treatment is
Which of the following will equal the average time that a customer is in the system?
Suppose four heads appeared face up on four tosses of a coin. what is the probability that a head will appear face up in the next toss of the coin?
A family wants to fence a rectangular play area alongside the wall of their house. The wall of their house bounds one side of the play area. If they want the play area to be exactly 400ft2, what is the least amount of fencing needed to make this
If the population standard deviation of annual usage is 3,500 kwh, what is the probability that the sample mean will be each of the following?
Test the hypothesis that the mean difference in pulse rate was more than 0, using a significance level of 0.05. Assume the population distribution is Normal.
Tow coins are tossed. The sample space is. Determine the sample space if the coin is tossed 3 times. A red die and a green die are rolled. How many items are there in the sample space
The Federal Government of Australia uses the cash rate to control the inflation rate in Australia. Is there statistical evidence to support such a policy?
Tourism was hit hard by the international financial crisis that began in the fall of 2008. According to the Bureau of Economic Analysis
if 100 tires are randomly selected for shipment to an outlet, what is the probability that they are all good? should this outlet plan to deal with defective tires returned by consumers?
one person has 3 dollars to gamble each time he uses only one dollar the probability is 60 to lose and 40 to win. if he
a computer chip manufacturer rejects 6 percent of the chips produced because they fail to work properly when tested.
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