Mathematics, 16.03.2020 16:58 ansarishaheer2888
A UMBC student has two different email accounts. Suppose that 70% of her messages come into Account 1. Of the messages that come into Account 1.5% are spam. Meanwhile, of the messages that come into Account 2.8% are spam.
a) If a message is randomly selected, what is the probability that it is NOT a spam?
b) If a randomly selected message is a spam, what is the probability that it came from Account 1.
c) Suppose 5 messages are randomly selected. What is the probability that exactly 2 of them are spam? dy
d) Suppose 20 messages are randomly selected. What is the probability that at least 3 of them are not spam?
Answers: 2
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Which linear inequality is represented by the graph? !
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Mathematics, 21.06.2019 23:00, freebyyy7032
Unaware that 35% of the 10000 voters in his constituency support him, a politician decides to estimate his political strength. a sample of 200 voters shows that 40% support him. a. what is the population? b. what is the parameter of interest? state its value c. what is the statistics of the interest? state its value d. compare your answers in (b) and (c) is it surprising they are different? if the politician were to sample another 200 voters, which of the two numbers would most likely change? explain
Answers: 2
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