8. Suppose that a recent poll of American households about pet ownership found that for households with one pet, 39% owned a dog. Suppose a random sample of 120 households with only one pet is selected. (a) Find the usual values interval for households with a pet dog. (41.5, 52.1) (b) Determine whether it is unusual to find 40 household with a pet dog in a random, independent sample of 120 households.

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7. Suppose that a recent poll of America households about pet ownership found that for
households with one pet, 39% owned a dog. Suppose a random sample of 12 households with
only one pet is selected. Use Binomial distribution to find the probability that 3 households will
have a dog? Show work.
0.1526
8. Suppose that a recent poll of American households about pet ownership found that for
households with one pet, 39% owned a dog. Suppose a random sample of 120 households with
only one pet is selected.
(a) Find the usual values interval for households with a pet dog.(41.5, 52.4)
(b) Determine whether it is unusual to find 40 household with a pet dog in a random,
independent sample of 120 households.
9. Two balls are drawn successively without replacement from a bucket containing four red and
three blue balls. Assume that all balls are equally likely to be chosen.
a) Find the probability that both balls are red.
b) Find the probability that at least one ball is blue.
c) Find the probability that first ball is blue and the second one is red.
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Transcribed Image Text:7. Suppose that a recent poll of America households about pet ownership found that for households with one pet, 39% owned a dog. Suppose a random sample of 12 households with only one pet is selected. Use Binomial distribution to find the probability that 3 households will have a dog? Show work. 0.1526 8. Suppose that a recent poll of American households about pet ownership found that for households with one pet, 39% owned a dog. Suppose a random sample of 120 households with only one pet is selected. (a) Find the usual values interval for households with a pet dog.(41.5, 52.4) (b) Determine whether it is unusual to find 40 household with a pet dog in a random, independent sample of 120 households. 9. Two balls are drawn successively without replacement from a bucket containing four red and three blue balls. Assume that all balls are equally likely to be chosen. a) Find the probability that both balls are red. b) Find the probability that at least one ball is blue. c) Find the probability that first ball is blue and the second one is red. Desktop DELL E5 F6 F7 F8 F9 F10 F11 F12 PrtScr 近
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