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A person was trying to figure out the probability of getting two heads when flipping two coins. He flipped two coins 10 times, and in 2 of these 10 times, both coins landed heads. ON the basis of this outcome, he claims that the probability of two heads is 2/10, or 20%. Is this an example of an empirical probability or theoretical probability? Explain.
What is the probability of selecting an area code at random that ends with an odd number if the first digit can't be 1 or zero?
the time to failure of an electrical component in constant failure rate mode follows an exponential distribution with
Why are quasi-experimental designs used more often than experimental designs?
Random samples of size 64 are taken from a large population whose mean is 160 and whose standard deviation is 25. What is the mean of the sampling distribution of the sample mean?
What is the mean amount spent on insurance? If we select a family at random, what is the probability they spend less than $2,000 per year on insurance per year?
a researcher wishes to determine whether happiness and marital status are dependent from one another. the table below
Test the hypothesis that the die is fair (that is, that pi = 1 , i = 1, ... , 6) at the 5 percent level of significance. Use the chi-square approximation.
Use the Rare Event Rule. Does the evidence support the claim?
1. suppose 2 of cotton fabric rolls and 4 of nylon rolls contain flaws. of the rolls used by a manufacturer 70 are
At the .05 significance level, is the number of units produced on the afternoon shift larger?
a correlation coefficient has an associated probability value of .02 then1. the results are important2. the hypothesis
The machine currently has ten cans of each type. If 15 customers want to purchase drinks prior to the machine being restocked, what is the probability that each of the 15 is able to purchase the type of drink desired?
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