Question

4. (10pts) Suppose that 40% of U.S. voters are Democrats. What is the probability that in a sample of 200 voters that at least 90 people will be an Democrat?

Answer #1

Suppose that 40% of U.S. voters are Democrats. What is the
probability that in a sample of 200 voters that at least 90 people
will be a Democrat?

In summit county 35% of registered voters are democrats. What is
the probability that in a random sample of 300 voters: A) 100 or
more are democrats? B) Between 100 and 120 are democrats? C) 90 or
fewer are democrats?

In a certain town, 39.1% of the voters are Democrats and 60.9%
of the voters are Republicans. In the last election 30.8% of the
Democrats, and 39.6% of the Republicans voted.
a) If a citizen who voted in the last election is randomly
selected, what is the probability that they are a
Republican?
b) If a citizen who is a Democrat is randomly
selected, what is the probability that they did not vote in the
last election?
*please answer both...

Suppose 60% of the registered voters in a country are Democrats.
If a sample of 793 voters is selected, what is the probability that
the sample proportion of Democrats will be greater than 64%? Round
your answer to four decimal places.

In one state, 52% of the voters are Republicans, and 48% are
Democrats. In a second state, 47% of the voters are Republicans,
and 53% are Democrats. Suppose a simple random sample of 100 voters
are surveyed from each state.
What is the probability that the survey will show a greater
percentage of Republican voters in the second state than in the
first state?

Twenty percent of registered voters are Whigs, 35% are Free
Soilers, 35% are Jacksonian Democrats, and 10% are independent. A
focus group of 50 voters is randomly selected from the population
of registered voters.
(a) What is the probability that the sample contains 10 Whigs,
18 Free Soilers, 17 Jacksonian Democrats and 5 independents? You
may use R or any other computational aid to find the answer.
(b) If Jacksonian Democrats and Free Soilers are lumped together
as a single...

Suppose that 56% of the population of U.S. voters
favors a particular presidential candidate
If a random sample of 40 voters is chosen, approximate the
proportion that at most 19% favor this candidate.
Use the normal approximation to the binomial with a correction for
continuity. round your answer to at least three decima places.
Don't round any intermediate set

Suppose that of all voters in Florida, 40% (p=.4) are in
favorite of candidate Brown for Governor. Pollsters take a sample
of 2400 voters. What proportion of the sample would be expected to
favor candidate Brown? (show your work)

1. Suppose that 61% of all the city’s voters favor the
candidate. Find the probability that in a random sample
poll of 18 voters taken in a large city,
at least 75% will favor a certain
candidate for mayor.
2. Suppose that 61% of all the city’s voters favor the
candidate. Find the probability that in a random sample
poll of 18 voters taken in a large city, less than
6 will favor a certain candidate for mayor.

Given 10 democrats, 7 republicans, and 3 independents, what is
the probability that AT LEAST ONE of the groups is not represented
in a randomly selected committee of 5 people?

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