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A random sample of 15 teachers from Rhode Island has an average salary of $35,270, with a standard deviation of $3,256. A random sample of 30 teachers from New York has an average salary of $29,512, with a standard deviation of $1,432. Is there a significant difference between the two states? Use a = 0.02. Find the 98% confidence interval for the difference of the two means.
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Construct the probability distribution for the value of a 2-card hand dealt from a standard deck of 52 cards (all face cards have a value of 10 and an ace has a value of 11).
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Assume the probability that a person has the desease is 0.1 for all people, independently of each other. Compute the total expected number of tests necessary.
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Determine the probability that Mary obtains exactly one Head.
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breeding pairs of common robin typically produce a clutch of 3 to 6 eggs. what is the probability they will only
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