Question

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?

Answer #1

In a given county, records show that of the registered voters,
50% are Democrats, 35% are Republicans, and 15% are
Independents. In an election, 80% of the Democrats, 40% of the
Republicans, and 90% of the Independents voted in favor of a parks
and recreation bond proposal. If a registered voter chosen at
random is found to have voted in favor of the bond, what is the
probability that the voter is a Republican?

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...

In a certain town, there are 4,000 registered voters, of whom
1,600 are Democrats. A survey organization is about to take a
random sample of 100 registered voters.
(a) There is about a 50-50 chance that the percentage of
Democrats in the sample will be bigger than _____.
(b) Find the expected value for the sample percentage,
(c) Find the standard error for the sample percentage.
(d) Find the chance that 30% or more of the people in sample are...

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.

For several years, Democrats have account for 90% of the
registered voters in the District. A campaign strategist takes a
survey of 75 voters and finds that there are 64 registered
Democrats. Has this percentage of registered Democrats
changed?
A, state the appropriate hypotheses
and test using (alpha = 0.07)
B, Draw the necessary sampling
distribution indicating the critical values for (alpha = 0.07)
C, state the decision
D, State the conclusion
E, what error is risked
F construct 93%...

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?

5) 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 Democrat?

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?

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 Democrat?

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?

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